diff --git a/layout/base/src/nsFrameImageLoader.cpp b/layout/base/src/nsFrameImageLoader.cpp
index fc5b43df2603..3f41934ff9fd 100644
--- a/layout/base/src/nsFrameImageLoader.cpp
+++ b/layout/base/src/nsFrameImageLoader.cpp
@@ -154,7 +154,7 @@ nsFrameImageLoader::Init(nsIPresContext* aPresContext,
   // Start image load request
   mImageRequest = aGroup->GetImage(cp, this, aBackgroundColor,
                                    desiredWidth, desiredHeight, 0);
-  delete cp;
+  delete[] cp;
 
   return NS_OK;
 }