diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 818a011ff..a3924f4a5 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -40,7 +40,7 @@ define Package/ethtool/description
 endef
 
 define Package/ethtool/config
-	source "$(SOURCE)/Config.in
+	source "$(SOURCE)/Config.in"
 endef
 
 ifeq ($(CONFIG_ETHTOOL_PRETTY_DUMP),y)