diff --git a/Makefile b/Makefile
index e454469..ffe9f0c 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,6 @@ clean:
 	@rm -f isi.so $(OBJECTS)
 
 install: isi.so
-	install isi.so $(DESTDIR)${PREFIX}/${PLUGINDIR}
+	install -m 644 isi.so $(DESTDIR)${PREFIX}/${PLUGINDIR}
 
 .PHONEY: all clean install