1 files changed, 4 insertions, 0 deletions

diff --git a/sway/commands/client.c b/sway/commands/client.c
index 30f9137e..f3d879cd 100644
--- a/sway/commands/client.c
+++ b/sway/commands/client.c
@@ -25,6 +25,10 @@ static struct cmd_results *parse_border_color(struct border_colors *border_color
                 *colors[i] = strtoul(buffer + 1, NULL, 16);
         }
 
+        if (argc < 5) {
+                border_colors->child_border = border_colors->background;
+        }
+
         return cmd_results_new(CMD_SUCCESS, NULL, NULL);
 }