diff --git a/Makefile b/Makefile
index ca0f349b49a14b0ea5c8eb3d3c210a2dd47dccfe..de6839d90e08a3f08247da8ca5e8732bb0050cca 100644
--- a/Makefile
+++ b/Makefile
@@ -8,4 +8,4 @@ new:
 		cp -n main.tex .gitignore ..
 	fi
 clean:
-	rm -r *.{pdf,aux,toc,acn,acr,log,ptc,out,idx,ist,alg,glo} 2>/dev/null
+	rm -f *pdf *.aux *.toc *.acn *.acr *.log *.ptc *.out *.idx *.ist *.alg *.glo