3 files changed, 11 insertions, 1 deletions

diff --git a/include/config.h b/include/config.h
index 8338033c..3cbe7ce0 100644
--- a/include/config.h
+++ b/include/config.h
@@ -98,6 +98,7 @@ char *do_var_replacement(char *str);
 /** Sets up a WLC output handle based on a given output_config.
  */
 void apply_output_config(struct output_config *oc, swayc_t *output);
+void free_output_config(struct output_config *oc);
 
 /**
  * Global config singleton.
diff --git a/sway/commands.c b/sway/commands.c
index 2cfda07c..f194681e 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -733,6 +733,15 @@ static struct cmd_results *cmd_output(int argc, char **argv) {
                 }
         }
 
+        for (i = 0; i < config->output_configs->length; ++i) {
+                struct output_config *oc = config->output_configs->items[i];
+                if (strcmp(oc->name, output->name) == 0) {
+                        // replace existing config
+                        list_del(config->output_configs, i);
+                        free_output_config(oc);
+                        break;
+                }
+        }
         list_add(config->output_configs, output);
 
         sway_log(L_DEBUG, "Config stored for output %s (%d x %d @ %d, %d)",
diff --git a/sway/config.c b/sway/config.c
index 0b25ee60..ce6d8baf 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -36,7 +36,7 @@ static void free_mode(struct sway_mode *mode) {
         free(mode);
 }
 
-static void free_output_config(struct output_config *oc) {
+void free_output_config(struct output_config *oc) {
         free(oc->name);
         free(oc);
 }