diff --git a/libraries/animation/src/AnimSkeleton.cpp b/libraries/animation/src/AnimSkeleton.cpp
index 36b14a97ce..7879c8a776 100644
--- a/libraries/animation/src/AnimSkeleton.cpp
+++ b/libraries/animation/src/AnimSkeleton.cpp
@@ -81,7 +81,7 @@ AnimPose AnimSkeleton::getAbsolutePose(int jointIndex, const AnimPoseVec& poses)
 
 void AnimSkeleton::convertRelativePosesToAbsolute(AnimPoseVec& poses) const {
     // poses start off relative and leave in absolute frame
-    for (int i = 0; i < poses.size() && i < _joints.size(); ++i) {
+    for (int i = 0; i < (int)poses.size() && i < (int)_joints.size(); ++i) {
         int parentIndex = _joints[i].parentIndex;
         if (parentIndex != -1) {
             poses[i] = poses[parentIndex] * poses[i];