diff --git a/crypto/modes/Makefile b/crypto/modes/Makefile
index cbda0522cf..90de96b8bd 100644
--- a/crypto/modes/Makefile
+++ b/crypto/modes/Makefile
@@ -92,7 +92,7 @@ dclean:
 	mv -f Makefile.new $(MAKEFILE)
 
 clean:
-	rm -f *.o */*.o *.obj lib tags core .pure .nfs* *.old *.bak fluff
+	rm -f *.s *.o */*.o *.obj lib tags core .pure .nfs* *.old *.bak fluff
 
 # DO NOT DELETE THIS LINE -- make depend depends on it.