diff --git a/reactos/dll/win32/mlang/regsvr.c b/reactos/dll/win32/mlang/regsvr.c
index f5292bff704..eb6cbd4cc78 100644
--- a/reactos/dll/win32/mlang/regsvr.c
+++ b/reactos/dll/win32/mlang/regsvr.c
@@ -33,6 +33,8 @@
 #include "mlang.h"
 
 #include "wine/debug.h"
+#include "wine/unicode.h"
+
 #include "initguid.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(mlang);
@@ -163,7 +165,7 @@ static HRESULT register_interfaces(struct regsvr_interface const *list)
 				  KEY_READ | KEY_WRITE, NULL, &key, NULL);
 	    if (res != ERROR_SUCCESS) goto error_close_iid_key;
 
-	    wsprintfW(buf, fmt, list->num_methods);
+	    sprintfW(buf, fmt, list->num_methods);
 	    res = RegSetValueExW(key, NULL, 0, REG_SZ,
 				 (CONST BYTE*)buf,
 				 (lstrlenW(buf) + 1) * sizeof(WCHAR));