diff --git a/sys/arm64/include/_types.h b/sys/arm64/include/_types.h
index c2857ec5d6ce..8720ca883c5b 100644
--- a/sys/arm64/include/_types.h
+++ b/sys/arm64/include/_types.h
@@ -94,7 +94,7 @@ typedef	__uint64_t	__vm_pindex_t;
 typedef	__uint64_t	__vm_size_t;
 typedef	unsigned int	___wchar_t;
 
-#define	__WCHAR_MIN	__UINT_MIN	/* min value for a wchar_t */
+#define	__WCHAR_MIN	0		/* min value for a wchar_t */
 #define	__WCHAR_MAX	__UINT_MAX	/* max value for a wchar_t */
 
 /*