diff --git a/src/process_pipeline.c b/src/process_pipeline.c
index 395389f..ddab3f4 100644
--- a/src/process_pipeline.c
+++ b/src/process_pipeline.c
@@ -646,6 +646,7 @@ process_aaa()
                                   state_proc.red,
                                   state_proc.blue,
                                   state_proc.blacklevel);
+		g_free(center);
 }
 
 static GdkTexture *