diff --git a/silk/x86/NSQ_del_dec_avx2.c b/silk/x86/NSQ_del_dec_avx2.c
index 21f00c2d..63734eeb 100644
--- a/silk/x86/NSQ_del_dec_avx2.c
+++ b/silk/x86/NSQ_del_dec_avx2.c
@@ -72,7 +72,7 @@ static OPUS_INLINE int verify_assumptions(const silk_encoder_state *psEncC)
 
 /* Intrinsics not defined on MSVC */
 #ifdef _MSC_VER
-#include <Intsafe.h>
+#include <intsafe.h>
 static inline int __builtin_sadd_overflow(opus_int32 a, opus_int32 b, opus_int32* res)
 {
     *res = a+b;