diff --git a/src/util/common.h b/src/util/common.h
index 6f17d58e9..050db0513 100644
--- a/src/util/common.h
+++ b/src/util/common.h
@@ -70,7 +70,11 @@ typedef intptr_t ssize_t;
 #endif
 
 #if defined(_3DS) || defined(GEKKO) || defined(PSP2)
-// newlib doesn't support %z properly
+// newlib doesn't support %z properly by default
+#define PRIz ""
+#elif defined(_WIN64)
+#define PRIz "ll"
+#elif defined(_WIN32)
 #define PRIz ""
 #else
 #define PRIz "z"