diff --git a/src/radeon_dri2.c b/src/radeon_dri2.c
index 2668812..4dd305a 100644
--- a/src/radeon_dri2.c
+++ b/src/radeon_dri2.c
@@ -984,7 +991,7 @@ blit_fallback:
     radeon_dri2_copy_region(draw, &region, front, back);
 
     DRI2SwapComplete(client, draw, 0, 0, 0, DRI2_BLIT_COMPLETE, func, data);
-    if (swap_info) {
+    if (crtc != -1 && swap_info) {
         ListDelDRI2ClientEvents(swap_info->client, &swap_info->link);
         free(swap_info);
     }