diff --git a/docs/Makefile b/docs/Makefile
index 6eadcfec41a410c59875648728427c7909ec8fa3..69c19c826d17ccd889d1d74fdd4e6e041990d573 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -25,7 +25,7 @@ art_html_build : *.sgml *.dsl *.css
 	 else \
 	   mkdir art_html_build; \
 	 fi; \
-	 cd art_html_build; ln -sf ../*.sgml ../*.gif ../*.eps ../*.css .; \
+	 cd art_html_build; ln -sf ../*.sgml ../*.gif ../*.png ../*.eps ../*.css .; \
 	 $(JADE) $(JADE_PARAM) manual.sgml;\
 	 $(JADE) -V nochunks $(JADE_PARAM) manual.sgml > artemis_manual_complete.html)
 
@@ -36,7 +36,7 @@ act_html_build : *.sgml *.dsl *.css
 	 else \
 	   mkdir act_html_build; \
 	 fi; \
-	 cd act_html_build; ln -sf ../*.sgml ../*.gif ../*.eps ../*.css .; \
+	 cd act_html_build; ln -sf ../*.sgml ../*.gif ../*.png ../*.eps ../*.css .; \
 	 $(JADE) $(JADE_PARAM) act_manual.sgml;\
 	 $(JADE) -V nochunks $(JADE_PARAM) act_manual.sgml > act_manual_complete.html)