1 files changed, 3 insertions, 0 deletions

diff --git a/sway/commands/output/background.c b/sway/commands/output/background.c
index f65904bb..5a15ed0f 100644
--- a/sway/commands/output/background.c
+++ b/sway/commands/output/background.c
@@ -61,6 +61,9 @@ struct cmd_results *output_cmd_background(int argc, char **argv) {
                         return cmd_results_new(CMD_INVALID,
                                 "Missing background scaling mode.");
                 }
+                if (j == 0) {
+                        return cmd_results_new(CMD_INVALID, "Missing background file");
+                }
 
                 wordexp_t p = {0};
                 char *src = join_args(argv, j);