diff --git a/library/cipher.c b/library/cipher.c
index 277811a..f0a770a 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -44,7 +44,8 @@
 #define POLARSSL_CIPHER_MODE_STREAM
 #endif
 
-#if defined(_MSC_VER) && !defined strcasecmp
+#if defined(_MSC_VER) && !defined strcasecmp && !defined(EFIX64) && \
+    !defined(EFI32)
 #define strcasecmp _stricmp
 #endif