1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index fb6b061..8c56f0f 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ uninstall:
 	-rm -- "$(DESTDIR)$(MANPREFIX)/man1/timeprefix.1"
 
 clean:
-	-rm -f -- timeprefix *.o
+	-rm -f -- timeprefix *.o *.su
 
 .SUFFIXES:
 .SUFFIXES: .o .c