diff --git a/src/argv/ntapi_tt_array_utf16.c b/src/argv/ntapi_tt_array_utf16.c
index 6235606..d035ad4 100644
--- a/src/argv/ntapi_tt_array_utf16.c
+++ b/src/argv/ntapi_tt_array_utf16.c
@@ -294,6 +294,7 @@ int32_t __stdcall __ntapi_tt_array_convert_utf16_to_utf8(
 		warrv++;
 	}
 
+	*arrv = 0;
 	*bytes_written = (size_t)(ch - (uint8_t *)buffer);
 
 	return NT_STATUS_SUCCESS;