diff --git a/widget/gtk/nsWindow.cpp b/widget/gtk/nsWindow.cpp
index 00f0afb7af9c..e0546a36ff03 100644
--- a/widget/gtk/nsWindow.cpp
+++ b/widget/gtk/nsWindow.cpp
@@ -2220,7 +2220,7 @@ nsWindow::OnExposeEvent(cairo_t *cr)
         }
     }
 #  ifdef MOZ_HAVE_SHMIMAGE
-    if (nsShmImage::UseShm() && MOZ_LIKELY(!mIsDestroyed)) {
+    if (mShmImage && MOZ_LIKELY(!mIsDestroyed)) {
 #if (MOZ_WIDGET_GTK == 2)
         mShmImage->Put(mGdkWindow, exposeRegion.mRects, exposeRegion.mRectsEnd);
 #else