diff --git a/embedding/tests/gtkEmbed/WebBrowser.cpp b/embedding/tests/gtkEmbed/WebBrowser.cpp
index f8c118de016a..c59af5ac8657 100644
--- a/embedding/tests/gtkEmbed/WebBrowser.cpp
+++ b/embedding/tests/gtkEmbed/WebBrowser.cpp
@@ -165,6 +165,6 @@ WebBrowser::Print(void)
 nsresult 
 WebBrowser::SetPositionAndSize(int x, int y, int cx, int cy)
 {
-    return mBaseWindow->SetPositionAndSize(x, y, cx, cy, true);
+    return mBaseWindow->SetPositionAndSize(x, y, cx, cy, PR_TRUE);
 }