diff --git a/libopenjpeg/opj_includes.h b/libopenjpeg/opj_includes.h
index dbf0f505..b67c9579 100644
--- a/libopenjpeg/opj_includes.h
+++ b/libopenjpeg/opj_includes.h
@@ -89,6 +89,9 @@ Most compilers implement their own version of this keyword ...
 
 /* MSVC and Borland C do not have lrintf */
 #if defined(_MSC_VER) || defined(__BORLANDC__)
+
+/* MSVC 64bits doesn't support _asm */
+#if !defined(_WIN64)
 static INLINE long lrintf(float f){
 	int i;
 
@@ -97,8 +100,25 @@ static INLINE long lrintf(float f){
 		fistp i
 	};
 
-	return i;
+  return i;
+}
+#else
+static INLINE long lrintf(float x){
+  int r;
+  if (x>=0.f)
+  {
+     x+=0.5f;
+  }
+  else
+  {
+     x-=0.5f;
+  }
+  r = (int)(x);
+  if ( x != (float)(r) ) return r;
+  return 2*(r/2);
 }
 #endif
 
+#endif
+
 #endif /* OPJ_INCLUDES_H */