diff --git a/programs/uninstaller/main.c b/programs/uninstaller/main.c
index 8941d3a47ad..d8203b6763b 100644
--- a/programs/uninstaller/main.c
+++ b/programs/uninstaller/main.c
@@ -70,7 +70,7 @@ static void output_writeconsole(const WCHAR *str, DWORD len)
     }
 }
 
-static void output_formatstring(const WCHAR *fmt, __ms_va_list va_args)
+static void output_formatstring(const WCHAR *fmt, va_list va_args)
 {
     WCHAR *str;
     DWORD len;
@@ -89,25 +89,25 @@ static void output_formatstring(const WCHAR *fmt, __ms_va_list va_args)
 static void WINAPIV output_message(unsigned int id, ...)
 {
     WCHAR fmt[1024];
-    __ms_va_list va_args;
+    va_list va_args;
 
     if (!LoadStringW(GetModuleHandleW(NULL), id, fmt, ARRAY_SIZE(fmt)))
     {
         WINE_FIXME("LoadString failed with %d\n", GetLastError());
         return;
     }
-    __ms_va_start(va_args, id);
+    va_start(va_args, id);
     output_formatstring(fmt, va_args);
-    __ms_va_end(va_args);
+    va_end(va_args);
 }
 
 static void WINAPIV output_array(const WCHAR *fmt, ...)
 {
-    __ms_va_list va_args;
+    va_list va_args;
 
-    __ms_va_start(va_args, fmt);
+    va_start(va_args, fmt);
     output_formatstring(fmt, va_args);
-    __ms_va_end(va_args);
+    va_end(va_args);
 }
 
 /**