1 files changed, 3 insertions, 0 deletions
diff --git a/docs/Makefile b/docs/Makefile
index a2b330967c..0f1d83654f 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -185,6 +185,9 @@ $(DVIDIR)/%.dvi: %.dvi
 %.eps: %.dia
 	$(DIA) -t eps-builtin -e $@ $<
 
+%.png: %.dia
+	$(DIA) -e $@ $<
+
 %.pdf: %.eps
 	$(EPSTOPDF) $<