diff --git a/configure b/configure
index 6c890d0e36b..a9b495bcf09 100755
--- a/configure
+++ b/configure
@@ -19620,7 +19620,6 @@ for ac_func in \
 	exp2 \
 	exp2f \
 	fmaf \
-	lgammaf \
 	tgamma \
 	tgammaf
 
diff --git a/configure.ac b/configure.ac
index f5bf9bc071f..afb4dc7432a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2659,7 +2659,6 @@ AC_CHECK_FUNCS(\
 	exp2 \
 	exp2f \
 	fmaf \
-	lgammaf \
 	tgamma \
 	tgammaf
 )
diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index 6f0b0c1ba4f..3d8a63a8444 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -636,6 +636,38 @@ static float __expm1f(float x)
         y = (x - (e + u.f) + 1) * twopk;
     return y;
 }
+
+/* Copied from musl: src/math/__sindf.c */
+static float __sindf(double x)
+{
+    static const double S1 = -0x15555554cbac77.0p-55,
+        S2 = 0x111110896efbb2.0p-59,
+        S3 = -0x1a00f9e2cae774.0p-65,
+        S4 = 0x16cd878c3b46a7.0p-71;
+
+    double r, s, w, z;
+
+    z = x * x;
+    w = z * z;
+    r = S3 + z * S4;
+    s = z * x;
+    return (x + s * (S1 + z * S2)) + s * w * r;
+}
+
+/* Copied from musl: src/math/__cosdf.c */
+static float __cosdf(double x)
+{
+    static const double C0 = -0x1ffffffd0c5e81.0p-54,
+        C1 = 0x155553e1053a42.0p-57,
+        C2 = -0x16c087e80f1e27.0p-62,
+        C3 = 0x199342e0ee5069.0p-68;
+    double r, w, z;
+
+    z = x * x;
+    w = z * z;
+    r = C2 + z * C3;
+    return ((1.0 + z * C0) + w * C1) + (w * z) * r;
+}
 #endif
 
 #ifndef __i386__
@@ -987,38 +1019,6 @@ static int __rem_pio2f(float x, double *y)
     return n;
 }
 
-/* Copied from musl: src/math/__sindf.c */
-static float __sindf(double x)
-{
-    static const double S1 = -0x15555554cbac77.0p-55,
-        S2 = 0x111110896efbb2.0p-59,
-        S3 = -0x1a00f9e2cae774.0p-65,
-        S4 = 0x16cd878c3b46a7.0p-71;
-
-    double r, s, w, z;
-
-    z = x * x;
-    w = z * z;
-    r = S3 + z * S4;
-    s = z * x;
-    return (x + s * (S1 + z * S2)) + s * w * r;
-}
-
-/* Copied from musl: src/math/__cosdf.c */
-static float __cosdf(double x)
-{
-    static const double C0 = -0x1ffffffd0c5e81.0p-54,
-        C1 = 0x155553e1053a42.0p-57,
-        C2 = -0x16c087e80f1e27.0p-62,
-        C3 = 0x199342e0ee5069.0p-68;
-    double r, w, z;
-
-    z = x * x;
-    w = z * z;
-    r = C2 + z * C3;
-    return ((1.0 + z * C0) + w * C1) + (w * z) * r;
-}
-
 /*********************************************************************
  *      cosf (MSVCRT.@)
  *
@@ -8846,12 +8846,205 @@ double CDECL lgamma(double x)
     return r;
 }
 
+/* sin(pi*x) assuming x > 2^-100, if sin(pi*x)==0 the sign is arbitrary */
+static float sinf_pi(float x)
+{
+    double y;
+    int n;
+
+    /* spurious inexact if odd int */
+    x = 2 * (x * 0.5f - floorf(x * 0.5f)); /* x mod 2.0 */
+
+    n = (int)(x * 4);
+    n = (n + 1) / 2;
+    y = x - n * 0.5f;
+    y *= M_PI;
+    switch (n) {
+    default: /* case 4: */
+    case 0: return __sindf(y);
+    case 1: return __cosdf(y);
+    case 2: return __sindf(-y);
+    case 3: return -__cosdf(y);
+    }
+}
+
 /*********************************************************************
  *      lgammaf (MSVCR120.@)
+ *
+ * Copied from musl: src/math/lgammaf_r.c
  */
 float CDECL lgammaf(float x)
 {
-    return unix_funcs->lgammaf( x );
+    static const float pi = 3.1415927410e+00,
+        a0 = 7.7215664089e-02,
+        a1 = 3.2246702909e-01,
+        a2 = 6.7352302372e-02,
+        a3 = 2.0580807701e-02,
+        a4 = 7.3855509982e-03,
+        a5 = 2.8905137442e-03,
+        a6 = 1.1927076848e-03,
+        a7 = 5.1006977446e-04,
+        a8 = 2.2086278477e-04,
+        a9 = 1.0801156895e-04,
+        a10 = 2.5214456400e-05,
+        a11 = 4.4864096708e-05,
+        tc = 1.4616321325e+00,
+        tf = -1.2148628384e-01,
+        tt = 6.6971006518e-09,
+        t0 = 4.8383611441e-01,
+        t1 = -1.4758771658e-01,
+        t2 = 6.4624942839e-02,
+        t3 = -3.2788541168e-02,
+        t4 = 1.7970675603e-02,
+        t5 = -1.0314224288e-02,
+        t6 = 6.1005386524e-03,
+        t7 = -3.6845202558e-03,
+        t8 = 2.2596477065e-03,
+        t9 = -1.4034647029e-03,
+        t10 = 8.8108185446e-04,
+        t11 = -5.3859531181e-04,
+        t12 = 3.1563205994e-04,
+        t13 = -3.1275415677e-04,
+        t14 = 3.3552918467e-04,
+        u0 = -7.7215664089e-02,
+        u1 = 6.3282704353e-01,
+        u2 = 1.4549225569e+00,
+        u3 = 9.7771751881e-01,
+        u4 = 2.2896373272e-01,
+        u5 = 1.3381091878e-02,
+        v1 = 2.4559779167e+00,
+        v2 = 2.1284897327e+00,
+        v3 = 7.6928514242e-01,
+        v4 = 1.0422264785e-01,
+        v5 = 3.2170924824e-03,
+        s0 = -7.7215664089e-02,
+        s1 = 2.1498242021e-01,
+        s2 = 3.2577878237e-01,
+        s3 = 1.4635047317e-01,
+        s4 = 2.6642270386e-02,
+        s5 = 1.8402845599e-03,
+        s6 = 3.1947532989e-05,
+        r1 = 1.3920053244e+00,
+        r2 = 7.2193557024e-01,
+        r3 = 1.7193385959e-01,
+        r4 = 1.8645919859e-02,
+        r5 = 7.7794247773e-04,
+        r6 = 7.3266842264e-06,
+        w0 = 4.1893854737e-01,
+        w1 = 8.3333335817e-02,
+        w2 = -2.7777778450e-03,
+        w3 = 7.9365057172e-04,
+        w4 = -5.9518753551e-04,
+        w5 = 8.3633989561e-04,
+        w6 = -1.6309292987e-03;
+
+    union {float f; UINT32 i;} u = {x};
+    float t, y, z, nadj, p, p1, p2, p3, q, r, w;
+    UINT32 ix;
+    int i, sign;
+
+    /* purge off +-inf, NaN, +-0, tiny and negative arguments */
+    sign = u.i >> 31;
+    ix = u.i & 0x7fffffff;
+    if (ix >= 0x7f800000)
+        return x * x;
+    if (ix < 0x35000000) { /* |x| < 2**-21, return -log(|x|) */
+        if (sign)
+            x = -x;
+        return -logf(x);
+    }
+    if (sign) {
+        x = -x;
+        t = sinf_pi(x);
+        if (t == 0.0f) { /* -integer */
+            *_errno() = ERANGE;
+            return 1.0f / (x - x);
+        }
+        if (t <= 0.0f)
+            t = -t;
+        nadj = logf(pi / (t * x));
+    }
+
+    /* purge off 1 and 2 */
+    if (ix == 0x3f800000 || ix == 0x40000000)
+        r = 0;
+    /* for x < 2.0 */
+    else if (ix < 0x40000000) {
+        if (ix <= 0x3f666666) { /* lgamma(x) = lgamma(x+1)-log(x) */
+            r = -logf(x);
+            if (ix >= 0x3f3b4a20) {
+                y = 1.0f - x;
+                i = 0;
+            } else if (ix >= 0x3e6d3308) {
+                y = x - (tc - 1.0f);
+                i = 1;
+            } else {
+                y = x;
+                i = 2;
+            }
+        } else {
+            r = 0.0f;
+            if (ix >= 0x3fdda618) { /* [1.7316,2] */
+                y = 2.0f - x;
+                i = 0;
+            } else if (ix >= 0x3F9da620) { /* [1.23,1.73] */
+                y = x - tc;
+                i = 1;
+            } else {
+                y = x - 1.0f;
+                i = 2;
+            }
+        }
+        switch(i) {
+        case 0:
+            z = y * y;
+            p1 = a0 + z * (a2 + z * (a4 + z * (a6 + z * (a8 + z * a10))));
+            p2 = z * (a1 + z * (a3 + z * (a5 + z * (a7 + z * (a9 + z * a11)))));
+            p = y * p1 + p2;
+            r += p - 0.5f * y;
+            break;
+        case 1:
+            z = y * y;
+            w = z * y;
+            p1 = t0 + w * (t3 + w * (t6 + w * (t9 + w * t12))); /* parallel comp */
+            p2 = t1 + w * (t4 + w * (t7 + w * (t10 + w * t13)));
+            p3 = t2 + w * (t5 + w * (t8 + w * (t11 + w * t14)));
+            p = z * p1 - (tt - w * (p2 + y * p3));
+            r += (tf + p);
+            break;
+        case 2:
+            p1 = y * (u0 + y * (u1 + y * (u2 + y * (u3 + y * (u4 + y * u5)))));
+            p2 = 1.0f + y * (v1 + y * (v2 + y * (v3 + y * (v4 + y * v5))));
+            r += -0.5f * y + p1 / p2;
+        }
+    } else if (ix < 0x41000000) { /* x < 8.0 */
+        i = (int)x;
+        y = x - (float)i;
+        p = y * (s0 + y * (s1 + y * (s2 + y * (s3 + y * (s4 + y * (s5 + y * s6))))));
+        q = 1.0f + y * (r1 + y * (r2 + y * (r3 + y * (r4 + y * (r5 + y * r6)))));
+        r = 0.5f * y + p / q;
+        z = 1.0f; /* lgamma(1+s) = log(s) + lgamma(s) */
+        switch (i) {
+        case 7: z *= y + 6.0f; /* fall through */
+        case 6: z *= y + 5.0f; /* fall through */
+        case 5: z *= y + 4.0f; /* fall through */
+        case 4: z *= y + 3.0f; /* fall through */
+        case 3:
+            z *= y + 2.0f;
+            r += logf(z);
+            break;
+        }
+    } else if (ix < 0x5c800000) { /* 8.0 <= x < 2**58 */
+        t = logf(x);
+        z = 1.0f / x;
+        y = z * z;
+        w = w0 + z * (w1 + y * (w2 + y * (w3 + y * (w4 + y * (w5 + y * w6)))));
+        r = (x - 0.5f) * (t - 1.0f) + w;
+    } else /* 2**58 <= x <= inf */
+        r = x * (logf(x) - 1.0f);
+    if (sign)
+        r = nadj - r;
+    return r;
 }
 
 /*********************************************************************
diff --git a/dlls/msvcrt/unixlib.c b/dlls/msvcrt/unixlib.c
index 14aeef4c1e7..012ec6f6b85 100644
--- a/dlls/msvcrt/unixlib.c
+++ b/dlls/msvcrt/unixlib.c
@@ -94,19 +94,6 @@ static float CDECL unix_fmaf( float x, float y, float z )
 #endif
 }
 
-/*********************************************************************
- *      lgammaf
- */
-static float CDECL unix_lgammaf(float x)
-{
-#ifdef HAVE_LGAMMAF
-    return lgammaf(x);
-#else
-    FIXME( "not implemented\n" );
-    return 0;
-#endif
-}
-
 /*********************************************************************
  *      pow
  */
@@ -156,7 +143,6 @@ static const struct unix_funcs funcs =
     unix_exp2,
     unix_exp2f,
     unix_fmaf,
-    unix_lgammaf,
     unix_pow,
     unix_powf,
     unix_tgamma,
diff --git a/dlls/msvcrt/unixlib.h b/dlls/msvcrt/unixlib.h
index 4309ff835a0..a9c569d6f63 100644
--- a/dlls/msvcrt/unixlib.h
+++ b/dlls/msvcrt/unixlib.h
@@ -28,7 +28,6 @@ struct unix_funcs
     double          (CDECL *exp2)(double x);
     float           (CDECL *exp2f)(float x);
     float           (CDECL *fmaf)(float x, float y, float z);
-    float           (CDECL *lgammaf)(float x);
     double          (CDECL *pow)(double x, double y);
     float           (CDECL *powf)(float x, float y);
     double          (CDECL *tgamma)(double x);
diff --git a/include/config.h.in b/include/config.h.in
index dd34230b268..537dda5f68d 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -297,9 +297,6 @@
 /* Define to 1 if you have the `ldap_parse_vlv_control' function. */
 #undef HAVE_LDAP_PARSE_VLV_CONTROL
 
-/* Define to 1 if you have the `lgammaf' function. */
-#undef HAVE_LGAMMAF
-
 /* Define to 1 if you have the `gettextpo' library (-lgettextpo). */
 #undef HAVE_LIBGETTEXTPO