diff --git a/src/libsysprof/preload/sysprof-memory-collector.c b/src/libsysprof/preload/sysprof-memory-collector.c
index 4b118777..1b7785c7 100644
--- a/src/libsysprof/preload/sysprof-memory-collector.c
+++ b/src/libsysprof/preload/sysprof-memory-collector.c
@@ -187,7 +187,7 @@ track_free (void *ptr)
   if G_LIKELY (ptr && collector_ready)
     sysprof_collector_allocate (GPOINTER_TO_SIZE (ptr),
                                 0,
-                                backtrace_func,
+                                NULL,
                                 NULL);
 }