diff --git a/mff/diplomky/cs/Makefile b/mff/diplomky/cs/Makefile
index cc53abe..90756fe 100644
--- a/mff/diplomky/cs/Makefile
+++ b/mff/diplomky/cs/Makefile
@@ -16,4 +16,5 @@ prace.dvi: prace.tex $(wildcard *.tex)
 	cslatex $<
 
 clean:
-	rm -f *.{log,dvi,aux,toc,lof,out} prace.ps prace.pdf
+	rm -f *.log *.dvi *.aux *.toc *.lof *.out
+	rm -f prace.ps prace.pdf
diff --git a/mff/diplomky/en/Makefile b/mff/diplomky/en/Makefile
index 27a3ec5..8322ffd 100644
--- a/mff/diplomky/en/Makefile
+++ b/mff/diplomky/en/Makefile
@@ -16,4 +16,5 @@ thesis.dvi: thesis.tex $(wildcard *.tex)
 	cslatex $<
 
 clean:
-	rm -f *.{log,dvi,aux,toc,lof,out} thesis.ps thesis.pdf
+	rm -f *.log *.dvi *.aux *.toc *.lof *.out
+	rm -f thesis.ps thesis.pdf