diff --git a/build/mac/Moz.pm b/build/mac/Moz.pm
index 83c85e229a7..857820b6756 100644
--- a/build/mac/Moz.pm
+++ b/build/mac/Moz.pm
@@ -434,7 +434,6 @@ sub InstallResources($;$;$)
 
    	   system ("perl :mozilla:config:aboutime.pl :mozilla:xpfe:appshell:public:nsBuildID.h :mozilla:config:build_number");
 	   system ("perl :mozilla:config:aboutime.pl :mozilla:xpfe:browser:resources:locale:en-US:navigator.dtd :mozilla:config:build_number");
-	   system ("perl :mozilla:config:aboutime.pl :mozilla:xpfe:browser:resources:content:viewSource.xul :mozilla:config:build_number");
  }
 
 sub SetAgentString
diff --git a/config/makefile.win b/config/makefile.win
index d8987a19316..0685b8f5c4d 100644
--- a/config/makefile.win
+++ b/config/makefile.win
@@ -66,7 +66,6 @@ build_number::
     $(PERL) bdate.pl > $@
     echo Setting build number...
     $(PERL) aboutime.pl $(DEPTH)/xpfe/browser/resources/locale/en-US/navigator.dtd $@
-    $(PERL) aboutime.pl $(DEPTH)/xpfe/browser/resources/content/viewSource.xul $@
     $(PERL) aboutime.pl $(DEPTH)/xpfe/appshell/public/nsBuildID.h $@
 !endif
 
diff --git a/xpfe/browser/resources/content/Makefile.in b/xpfe/browser/resources/content/Makefile.in
index 41cce8e2bc8..1e355da693e 100644
--- a/xpfe/browser/resources/content/Makefile.in
+++ b/xpfe/browser/resources/content/Makefile.in
@@ -60,10 +60,3 @@ include $(topsrcdir)/config/rules.mk
 # for some reason puma decided to create a directory viewSource.xul.out
 GARBAGE_DIRS	+= viewSource.xul.out
 
-# viewSource.xul.out: viewSource.xul $(DEPTH)/config/build_number
-# 	cp $(srcdir)/viewSource.xul $@
-# 	$(PERL) $(topsrcdir)/config/aboutime.pl $@ $(DEPTH)/config/build_number
-
-# install:: viewSource.xul.out
-# 	cp viewSource.xul.out $(CHROME_DIST)/$(CHROME_CONTENT_DIR)/viewSource.xul
-