diff --git a/reactos/dll/win32/user32/windows/defwnd.c b/reactos/dll/win32/user32/windows/defwnd.c
index 8205bb2f4e0..36ba8c35f1e 100644
--- a/reactos/dll/win32/user32/windows/defwnd.c
+++ b/reactos/dll/win32/user32/windows/defwnd.c
@@ -76,7 +76,7 @@ GetSysColor(int nIndex)
 HPEN STDCALL
 GetSysColorPen(int nIndex)
 {
-  if(nIndex >= 0 && nIndex <= NUM_SYSCOLORS)
+  if(nIndex >= 0 && nIndex < NUM_SYSCOLORS)
   {
     return g_psi->SysColorPens[nIndex];
   }