diff --git a/doc/makefile b/doc/makefile
index a22613c2..f0c9114a 100644
--- a/doc/makefile
+++ b/doc/makefile
@@ -4,4 +4,5 @@ developer-guidelines.html: developer-guidelines.sgml
 	docbook2html -u developer-guidelines.sgml
 	if [[ -e developer-guidelines/developer-guidelines.html ]] ; then \
 		mv developer-guidelines/developer-guidelines.html . ;\
-	rm -f developer-guidelines ;\
+		rm -f developer-guidelines ;\
+	fi