diff --git a/spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateClip.cs b/spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateClip.cs
index efa194f09..0ab9b18f4 100644
--- a/spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateClip.cs
+++ b/spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateClip.cs
@@ -47,7 +47,7 @@ namespace Spine.Unity.Playables {
 
 		public override double duration {
 			get {
-				if (template.animationReference == null)
+				if (template.animationReference == null || template.animationReference.Animation == null)
 					return 0;
 				return template.animationReference.Animation.Duration;
 			}
diff --git a/spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateMixerBehaviour.cs b/spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateMixerBehaviour.cs
index d8051497b..17c998c95 100644
--- a/spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateMixerBehaviour.cs
+++ b/spine-unity/Modules/com.esotericsoftware.spine.timeline/Runtime/SpineAnimationState/SpineAnimationStateMixerBehaviour.cs
@@ -141,7 +141,7 @@ namespace Spine.Unity.Playables {
 
 				var skeleton = skeletonComponent.Skeleton;
 
-				bool skeletonDataMismatch = clipData.animationReference != null &&
+				bool skeletonDataMismatch = clipData.animationReference != null && clipData.animationReference.SkeletonDataAsset &&
 					skeletonComponent.SkeletonDataAsset.GetSkeletonData(true) != clipData.animationReference.SkeletonDataAsset.GetSkeletonData(true);
 				if (skeletonDataMismatch) {
 					Debug.LogWarningFormat("SpineAnimationStateMixerBehaviour tried to apply an animation for the wrong skeleton. Expected {0}. Was {1}",