diff --git a/gfx/layers/client/ContentClient.cpp b/gfx/layers/client/ContentClient.cpp
index ea87d142153..52952d14876 100644
--- a/gfx/layers/client/ContentClient.cpp
+++ b/gfx/layers/client/ContentClient.cpp
@@ -415,7 +415,9 @@ ContentClientDoubleBuffered::Dump(std::stringstream& aStream,
                                 bool aDumpHtml)
 {
   // TODO We should combine the OnWhite/OnBlack here an just output a single image.
-  aStream << "\n" << aPrefix << "Surface: ";
+  if (!aDumpHtml) {
+    aStream << "\n" << aPrefix << "Surface: ";
+  }
   CompositableClient::DumpTextureClient(aStream, mFrontClient);
 }