diff --git a/mozilla/content/base/src/nsDocumentViewer.cpp b/mozilla/content/base/src/nsDocumentViewer.cpp
index 4f6f8f891b2..04ba358126a 100644
--- a/mozilla/content/base/src/nsDocumentViewer.cpp
+++ b/mozilla/content/base/src/nsDocumentViewer.cpp
@@ -244,6 +244,8 @@ DocumentViewerImpl::DocumentViewerImpl(nsIPresContext* aPresContext)
   mForceCharacterSet = "";
   mAllowPlugins = PR_TRUE;
   mIsFrame = PR_FALSE;
+  mEnableRendering = PR_TRUE;
+
 }
 
 // ISupports implementation...
diff --git a/mozilla/layout/base/nsDocumentViewer.cpp b/mozilla/layout/base/nsDocumentViewer.cpp
index 4f6f8f891b2..04ba358126a 100644
--- a/mozilla/layout/base/nsDocumentViewer.cpp
+++ b/mozilla/layout/base/nsDocumentViewer.cpp
@@ -244,6 +244,8 @@ DocumentViewerImpl::DocumentViewerImpl(nsIPresContext* aPresContext)
   mForceCharacterSet = "";
   mAllowPlugins = PR_TRUE;
   mIsFrame = PR_FALSE;
+  mEnableRendering = PR_TRUE;
+
 }
 
 // ISupports implementation...
diff --git a/mozilla/layout/base/src/nsDocumentViewer.cpp b/mozilla/layout/base/src/nsDocumentViewer.cpp
index 4f6f8f891b2..04ba358126a 100644
--- a/mozilla/layout/base/src/nsDocumentViewer.cpp
+++ b/mozilla/layout/base/src/nsDocumentViewer.cpp
@@ -244,6 +244,8 @@ DocumentViewerImpl::DocumentViewerImpl(nsIPresContext* aPresContext)
   mForceCharacterSet = "";
   mAllowPlugins = PR_TRUE;
   mIsFrame = PR_FALSE;
+  mEnableRendering = PR_TRUE;
+
 }
 
 // ISupports implementation...