diff --git a/src/abstract/charset.c b/src/abstract/charset.c
index 3620aa0..47cc9a2 100644
--- a/src/abstract/charset.c
+++ b/src/abstract/charset.c
@@ -19,7 +19,7 @@ char* MwACPToUTF8(const char* input) {
 		return MwStringDuplicate(input);
 	}
 
-	wout = malloc(wbytes);
+	wout = malloc(wbytes + sizeof(wchar_t));
 	len  = wbytes / sizeof(wchar_t);
 
 	memset(wout, 0, wbytes);