diff --git a/layout/base/public/Makefile.in b/layout/base/public/Makefile.in
index 930a58a56389..c8be0c1ff6d6 100644
--- a/layout/base/public/Makefile.in
+++ b/layout/base/public/Makefile.in
@@ -42,7 +42,6 @@ nsIFrameManager.h \
 nsILayoutDebugger.h \
 nsINameSpace.h \
 nsINameSpaceManager.h \
-nsIFrameReflow.h \
 nsIFrameUtil.h \
 nsISelectionControler.h \
 nsIPageSequenceFrame.h \