diff --git a/Makefile b/Makefile
index 2fcc755..7e9ebc9 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ clean:
 install:
 	cp ./checkpw /usr/bin/
 	cp ./checkpw.1 /usr/share/man/man1/
-	gzip /usr/share/man/man1/checkpw.1
+	gzip -f /usr/share/man/man1/checkpw.1
 	cp ./checkpw.h /usr/include/
 
 uninstall: