diff --git a/sc2/src/sc2code/comm.c b/sc2/src/sc2code/comm.c
index 5f55207ed..8e142bf4a 100644
--- a/sc2/src/sc2code/comm.c
+++ b/sc2/src/sc2code/comm.c
@@ -1133,6 +1133,7 @@ int ambient_anim_task(void* data)
 								}
 								FrameRate = 0;
 							}
+							TransitionFrame = NULL;
 						}
 					}
 					TalkFrameChanged = TRUE;