diff --git a/dlls/wined3d/surface_base.c b/dlls/wined3d/surface_base.c
index 7536706887c..183cd2b5095 100644
--- a/dlls/wined3d/surface_base.c
+++ b/dlls/wined3d/surface_base.c
@@ -34,6 +34,57 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(d3d_surface);
 
+/* See also float_16_to_32() in wined3d_private.h */
+static inline unsigned short float_32_to_16(const float *in)
+{
+    int exp = 0;
+    float tmp = fabs(*in);
+    unsigned int mantissa;
+    unsigned short ret;
+
+    /* Deal with special numbers */
+    if(*in == 0.0) return 0x0000;
+    if(isnan(*in)) return 0x7C01;
+    if(isinf(*in)) return (*in < 0.0 ? 0xFC00 : 0x7c00);
+
+    if(tmp < pow(2, 10)) {
+        do
+        {
+            tmp = tmp * 2.0;
+            exp--;
+        }while(tmp < pow(2, 10));
+    } else if(tmp >= pow(2, 11)) {
+        do
+        {
+            tmp /= 2.0;
+            exp++;
+        }while(tmp >= pow(2, 11));
+    }
+
+    mantissa = (unsigned int) tmp;
+    if(tmp - mantissa >= 0.5) mantissa++; /* round to nearest, away from zero */
+
+    exp += 10;  /* Normalize the mantissa */
+    exp += 15;  /* Exponent is encoded with excess 15 */
+
+    if(exp > 30) { /* too big */
+        ret = 0x7c00; /* INF */
+    } else if(exp <= 0) {
+        /* exp == 0: Non-normalized mantissa. Returns 0x0000 (=0.0) for too small numbers */
+        while(exp <= 0) {
+            mantissa = mantissa >> 1;
+            exp++;
+        }
+        ret = mantissa & 0x3ff;
+    } else {
+        ret = (exp << 10) | (mantissa & 0x3ff);
+    }
+
+    ret |= ((*in < 0.0 ? 1 : 0) << 15); /* Add the sign */
+    return ret;
+}
+
+
 /* Do NOT define GLINFO_LOCATION in this file. THIS CODE MUST NOT USE IT */
 
 /* *******************************************
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 808d9bf50ff..b11a3f5086c 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -126,7 +126,8 @@ void init_type_lookup(WineD3D_GL_Info *gl_info);
 #define WINED3D_ATR_NORMALIZED(type)    GLINFO_LOCATION.glTypeLookup[type].normalized
 #define WINED3D_ATR_TYPESIZE(type)      GLINFO_LOCATION.glTypeLookup[type].typesize
 
-/* The following functions convert 16 bit floats in the FLOAT16 data type
+/* float_16_to_32() and float_32_to_16() (see implementation in
+ * surface_base.c) convert 16 bit floats in the FLOAT16 data type
  * to standard C floats and vice versa. They do not depend on the encoding
  * of the C float, so they are platform independent, but slow. On x86 and
  * other IEEE 754 compliant platforms the conversion can be accelerated by
@@ -152,54 +153,6 @@ static inline float float_16_to_32(const unsigned short *in) {
     }
 }
 
-static inline unsigned short float_32_to_16(const float *in) {
-    int exp = 0;
-    float tmp = fabs(*in);
-    unsigned int mantissa;
-    unsigned short ret;
-
-    /* Deal with special numbers */
-    if(*in == 0.0) return 0x0000;
-    if(isnan(*in)) return 0x7C01;
-    if(isinf(*in)) return (*in < 0.0 ? 0xFC00 : 0x7c00);
-
-    if(tmp < pow(2, 10)) {
-        do
-        {
-            tmp = tmp * 2.0;
-            exp--;
-        }while(tmp < pow(2, 10));
-    } else if(tmp >= pow(2, 11)) {
-        do
-        {
-            tmp /= 2.0;
-            exp++;
-        }while(tmp >= pow(2, 11));
-    }
-
-    mantissa = (unsigned int) tmp;
-    if(tmp - mantissa >= 0.5) mantissa++; /* round to nearest, away from zero */
-
-    exp += 10;  /* Normalize the mantissa */
-    exp += 15;  /* Exponent is encoded with excess 15 */
-
-    if(exp > 30) { /* too big */
-        ret = 0x7c00; /* INF */
-    } else if(exp <= 0) {
-        /* exp == 0: Non-normalized mantissa. Returns 0x0000 (=0.0) for too small numbers */
-        while(exp <= 0) {
-            mantissa = mantissa >> 1;
-            exp++;
-        }
-        ret = mantissa & 0x3ff;
-    } else {
-        ret = (exp << 10) | (mantissa & 0x3ff);
-    }
-
-    ret |= ((*in < 0.0 ? 1 : 0) << 15); /* Add the sign */
-    return ret;
-}
-
 /**
  * Settings 
  */