diff --git a/include/icsneo/platform/unaligned.h b/include/icsneo/platform/unaligned.h
index bf251ad..34c5663 100644
--- a/include/icsneo/platform/unaligned.h
+++ b/include/icsneo/platform/unaligned.h
@@ -1,7 +1,7 @@
 #ifndef __UNALIGNED_H_
 #define __UNALIGNED_H_
 
-#if defined(MSVC)
+#if defined(_MSC_VER)
 #define ICSNEO_UNALIGNED(x) __unaligned x
 #else
 #define ICSNEO_UNALIGNED(x) x