diff --git a/test/damage/primitives.c b/test/damage/primitives.c
index d60da8d04..de5652a17 100644
--- a/test/damage/primitives.c
+++ b/test/damage/primitives.c
@@ -102,6 +102,7 @@ compute_expected_damage(struct test_setup *setup)
 
     /* Make sure that the testcases actually render something! */
     assert(any_modified_pixels);
+    free(results);
 }
 
 /**