diff --git a/widget/src/windows/nsWindow.cpp b/widget/src/windows/nsWindow.cpp
index dde4eee8d6cf..fdd5821d0a16 100644
--- a/widget/src/windows/nsWindow.cpp
+++ b/widget/src/windows/nsWindow.cpp
@@ -1664,7 +1664,7 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM wParam, LPARAM lParam, LRESULT
                 ::SelectPalette(hDC, hOldPal, TRUE);
                 ::RealizePalette(hDC);
                 ::ReleaseDC(mWnd, hDC);
-                *aRetValue = (LRESULT)i;
+                *aRetValue = TRUE;
             }
             result = PR_TRUE;
             break;