diff --git a/make-includes/build_document_rules.make b/make-includes/build_document_rules.make
index 119ab7d..c628a02 100755
--- a/make-includes/build_document_rules.make
+++ b/make-includes/build_document_rules.make
@@ -149,8 +149,8 @@
 # Lists of files for cleaning up. Add to these (using +=) as necessary in
 # derived makefiles.
 #
-WEB_CLEAN_FILES:=$(DERIVED_WEB_FILES) *.png
-PRINT_CLEAN_FILES:=$(DERIVED_PRINT_FILES) *.pdf
+WEB_CLEAN_FILES:=$(DERIVED_WEB_FILES) *-web*.png
+PRINT_CLEAN_FILES:=$(DERIVED_PRINT_FILES) *-print*.png *.pdf
 ALL_CLEAN_FILES:=$(DERIVED_XML) $(WEB_CLEAN_FILES) $(PRINT_CLEAN_FILES)