diff --git a/src/pixi/extras/Spine.js b/src/pixi/extras/Spine.js
index 4184699..b275290 100644
--- a/src/pixi/extras/Spine.js
+++ b/src/pixi/extras/Spine.js
@@ -2042,7 +2042,7 @@
 				frameIndex++;
 			}
 			timelines.push(timeline);
-			duration = Math.max(duration, timeline.frames[timeline.frameCount * 3 - 3]);
+			duration = Math.max(duration, timeline.frames[timeline.getFrameCount() * 3 - 3]);
 		}
 
 		var ffd = map["ffd"];
@@ -2103,7 +2103,7 @@
 						frameIndex++;
 					}
 					timelines[timelines.length] = timeline;
-					duration = Math.max(duration, timeline.frames[timeline.frameCount - 1]);
+					duration = Math.max(duration, timeline.frames[timeline.getFrameCount() - 1]);
 				}
 			}
 		}