diff --git a/code/FBXAnimation.cpp b/code/FBXAnimation.cpp
index 6497279e4..678f4c59d 100644
--- a/code/FBXAnimation.cpp
+++ b/code/FBXAnimation.cpp
@@ -72,7 +72,11 @@ AnimationCurve::AnimationCurve(uint64_t id, const Element& element, const std::s
 	if(keys.size() != values.size()) {
 		DOMError("the number of key times does not match the number of keyframe values",&KeyTime);
 	}
-
+	
+	// check if the key times are well-ordered
+	if(!std::equal(keys.begin(), keys.end() - 1, keys.begin() + 1, std::less<KeyTimeList::value_type>())) {
+		DOMError("the keyframes are not in ascending order",&KeyTime);
+	}
 
 	const Element* KeyAttrDataFloat = sc["KeyAttrDataFloat"];
 	if(KeyAttrDataFloat) {
diff --git a/code/FBXConverter.cpp b/code/FBXConverter.cpp
index d38583973..5b4da48ab 100644
--- a/code/FBXConverter.cpp
+++ b/code/FBXConverter.cpp
@@ -1052,7 +1052,6 @@ private:
 
 	
 
-
 	// ------------------------------------------------------------------------------------------------
 	KeyFrameListList GetKeyframeList(const std::vector<const AnimationCurveNode*>& nodes)
 	{