diff --git a/include/cglm/simd/x86.h b/include/cglm/simd/x86.h
index 29a02f3..9f8e110 100644
--- a/include/cglm/simd/x86.h
+++ b/include/cglm/simd/x86.h
@@ -197,6 +197,11 @@ glmm_store3(float v[3], __m128 vx) {
   _mm_store_ss(&v[2], glmm_shuff1(vx, 2, 2, 2, 2));
 }
 
+/* enable FMA macro for MSVC? */
+#if !defined(__FMA__) && defined(__AVX2__)
+#  define __FMA__ 1
+#endif
+
 static inline
 __m128
 glmm_fmadd(__m128 a, __m128 b, __m128 c) {