diff --git a/reactos/dll/win32/user32/windows/messagebox.c b/reactos/dll/win32/user32/windows/messagebox.c
index 13b374af9d3..3809f590790 100644
--- a/reactos/dll/win32/user32/windows/messagebox.c
+++ b/reactos/dll/win32/user32/windows/messagebox.c
@@ -890,7 +890,7 @@ BOOL
 WINAPI
 MessageBeep(UINT uType)
 {
-    return (BOOL)NtUserCallOneParam(ONEPARAM_ROUTINE_MESSAGEBEEP, uType);
+    return (BOOL)NtUserCallOneParam(uType, ONEPARAM_ROUTINE_MESSAGEBEEP);
 }