diff --git a/mozilla/editor/composer/src/nsEditorShell.cpp b/mozilla/editor/composer/src/nsEditorShell.cpp
index ee987346137..22b2b24ebf4 100644
--- a/mozilla/editor/composer/src/nsEditorShell.cpp
+++ b/mozilla/editor/composer/src/nsEditorShell.cpp
@@ -1272,7 +1272,7 @@ nsEditorShell::GetHTMLSourceMode(PRBool *_retval)
 }
 
 NS_IMETHODIMP 
-nsEditorShell::SetHTMLSourceMode(const PRBool aSourceMode)
+nsEditorShell::SetHTMLSourceMode(PRBool aSourceMode)
 {
   mHTMLSourceMode = aSourceMode;