diff --git a/man/Makefile b/man/Makefile
index 2bf15fc5..151b9abc 100644
--- a/man/Makefile
+++ b/man/Makefile
@@ -3,4 +3,7 @@ all:
 	a2x -f manpage --asciidoc-opts="-f asciidoc.conf" i3-msg.man
 	a2x -f manpage --asciidoc-opts="-f asciidoc.conf" i3-input.man
 clean:
-	rm -f i3.{1,html,xml} i3-msg.{1,html,xml} i3-input.{1,html,xml}
+	for file in "i3 i3-msg i3-input"; \
+	do \
+		rm -f $${file}.1 $${file}.html $${file}.xml; \
+	done