diff --git a/content/media/webaudio/PannerNode.cpp b/content/media/webaudio/PannerNode.cpp
index 124eec991a7b..6492dbb842c8 100644
--- a/content/media/webaudio/PannerNode.cpp
+++ b/content/media/webaudio/PannerNode.cpp
@@ -237,6 +237,7 @@ PannerNodeEngine::EqualPowerPanningFunction(const AudioChunk& aInput,
       mConeInnerAngle == 360 &&
       mConeOuterAngle == 360) {
     *aOutput = aInput;
+    return;
   }
 
   // The output of this node is always stereo, no matter what the inputs are.