diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index 2bd4206359b..a2b03110cf0 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -4046,6 +4046,7 @@ double CDECL sin( double x )
 double CDECL sinh( double x )
 {
     UINT64 ux = *(UINT64*)&x;
+    UINT64 sign = ux & 0x8000000000000000ULL;
     UINT32 w;
     double t, h, absx;
 
@@ -4070,7 +4071,10 @@ double CDECL sinh( double x )
 
     /* |x| > log(DBL_MAX) or nan */
     /* note: the result is stored to handle overflow */
-    t = __expo2(absx, 2 * h);
+    if (ux > 0x7ff0000000000000ULL)
+        *(UINT64*)&t = ux | sign | 0x0008000000000000ULL;
+    else
+        t = __expo2(absx, 2 * h);
     return t;
 }