diff --git a/layout/generic/nsImageFrame.cpp b/layout/generic/nsImageFrame.cpp
index fc232b49451b..0dd16282f46e 100644
--- a/layout/generic/nsImageFrame.cpp
+++ b/layout/generic/nsImageFrame.cpp
@@ -3,7 +3,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-/* rendering object for replaced elements with bitmap image data */
+/* rendering object for replaced elements with image data */
 
 #include "nsImageFrame.h"
 
diff --git a/layout/generic/nsImageFrame.h b/layout/generic/nsImageFrame.h
index 8be688ab4a59..d765f00dcc2a 100644
--- a/layout/generic/nsImageFrame.h
+++ b/layout/generic/nsImageFrame.h
@@ -3,7 +3,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-/* rendering object for replaced elements with bitmap image data */
+/* rendering object for replaced elements with image data */
 
 #ifndef nsImageFrame_h___
 #define nsImageFrame_h___