diff --git a/ip/link_gre.c b/ip/link_gre.c
index 0461e5d0..6d4a8be8 100644
--- a/ip/link_gre.c
+++ b/ip/link_gre.c
@@ -536,10 +536,10 @@ static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 
 		if (erspan_dir == 0)
 			print_string(PRINT_ANY, "erspan_dir",
-				     "erspan_dir ingress ", NULL);
+				     "erspan_dir %s ", "ingress");
 		else
 			print_string(PRINT_ANY, "erspan_dir",
-				     "erspan_dir egress ", NULL);
+				     "erspan_dir %s ", "egress");
 	}
 
 	if (tb[IFLA_GRE_ERSPAN_HWID]) {
diff --git a/ip/link_gre6.c b/ip/link_gre6.c
index 9d270f4b..f33598af 100644
--- a/ip/link_gre6.c
+++ b/ip/link_gre6.c
@@ -594,10 +594,10 @@ static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 
 		if (erspan_dir == 0)
 			print_string(PRINT_ANY, "erspan_dir",
-				     "erspan_dir ingress ", NULL);
+				     "erspan_dir %s ", "ingress");
 		else
 			print_string(PRINT_ANY, "erspan_dir",
-				     "erspan_dir egress ", NULL);
+				     "erspan_dir %s ", "egress");
 	}
 
 	if (tb[IFLA_GRE_ERSPAN_HWID]) {