diff --git a/lang/basic/test/Makefile b/lang/basic/test/Makefile
index 485b3980d..13aafc11f 100644
--- a/lang/basic/test/Makefile
+++ b/lang/basic/test/Makefile
@@ -9,4 +9,4 @@ SRC=	bull.b buzzword.b checker.b creator.b grafiek.b gunner.b learn.b\
 head:	
 	for i in $(SRC) ; do runcmp $$i ; done
 clean:
-	rm -f *.b.[rx] *.[oskm]
+	rm -f *.b.[rx] *.[dekmos]