diff --git a/src/compositor-drm.c b/src/compositor-drm.c
index 96d66113..78ad35d3 100644
--- a/src/compositor-drm.c
+++ b/src/compositor-drm.c
@@ -2407,6 +2407,7 @@ output_section_done(void *data)
 		free(output_name);
 		free(output_mode);
 		free(output_transform);
+		free(output);
 		output_name = NULL;
 		output_mode = NULL;
 		output_transform = NULL;