diff --git a/layout/generic/nsObjectFrame.cpp b/layout/generic/nsObjectFrame.cpp

index c26ea79..fdff4e6 100644

--- a/layout/generic/nsObjectFrame.cpp

+++ b/layout/generic/nsObjectFrame.cpp

@@ -2798,7 +2798,8 @@ DoDelayedStop(nsPluginInstanceOwner *aInstanceOwner, PRBool aDelayedStop)

#endif

// Don't delay stopping QuickTime (bug 425157), Flip4Mac (bug 426524),

- // XStandard (bug 430219), CMISS Zinc (bug 429604).

+ // XStandard (bug 430219), CMISS Zinc (bug 429604),

+ // RealPlayer/Helix (bug 451007).

if (aDelayedStop

#if !(defined XP_WIN || defined MOZ_X11)

&& !aInstanceOwner->MatchPluginName("QuickTime")

@@ -2806,6 +2807,8 @@ DoDelayedStop(nsPluginInstanceOwner *aInstanceOwner, PRBool aDelayedStop)

&& !aInstanceOwner->MatchPluginName("XStandard plugin")

&& !aInstanceOwner->MatchPluginName("CMISS Zinc Plugin")

#endif

+ && !aInstanceOwner->MatchPluginName("RealPlayer")

+ && !aInstanceOwner->MatchPluginName("Helix")

) {

nsCOMPtr<nsIRunnable> evt = new nsStopPluginRunnable(aInstanceOwner);

NS_DispatchToCurrentThread(evt);