diff --git a/layout/html/base/src/nsHTMLIIDs.cpp b/layout/html/base/src/nsHTMLIIDs.cpp
index 8ab0510e815e..c94fda252dba 100644
--- a/layout/html/base/src/nsHTMLIIDs.cpp
+++ b/layout/html/base/src/nsHTMLIIDs.cpp
@@ -22,7 +22,6 @@
 #include "nsIFloaterContainer.h"
 #include "nsIRunaround.h"
 #include "nsIInlineReflow.h"
-#include "nsBlockFrame.h"
 
 const nsIID kIAbsoluteItemsIID = NS_IABSOLUTE_ITEMS_IID;
 const nsIID kIAnchoredItemsIID = NS_IANCHORED_ITEMS_IID;
@@ -30,4 +29,3 @@ const nsIID kIFloaterContainerIID = NS_IFLOATER_CONTAINER_IID;
 const nsIID kIHTMLContentIID = NS_IHTMLCONTENT_IID;
 const nsIID kIInlineReflowIID = NS_IINLINE_REFLOW_IID;
 const nsIID kIRunaroundIID = NS_IRUNAROUND_IID;
-const nsIID kBlockFrameCID = NS_BLOCK_FRAME_CID;