diff --git a/lottie/src/main/java/com/airbnb/lottie/AnimatableFloatValue.java b/lottie/src/main/java/com/airbnb/lottie/AnimatableFloatValue.java
index ffd299b..3bbce6e 100644
--- a/lottie/src/main/java/com/airbnb/lottie/AnimatableFloatValue.java
+++ b/lottie/src/main/java/com/airbnb/lottie/AnimatableFloatValue.java
@@ -1,5 +1,7 @@
 package com.airbnb.lottie;
 
+import android.util.Log;
+
 import org.json.JSONObject;
 
 import java.util.List;
@@ -51,6 +53,9 @@
     static AnimatableFloatValue newInstance(JSONObject json, LottieComposition composition,
         boolean isDp) {
       float scale = isDp ? composition.getDpScale() : 1f;
+      if (json.has("x")) {
+        Log.w(L.TAG, "Animation has expressions which are not supported.");
+      }
       AnimatableValueParser.Result<Float> result = AnimatableValueParser
           .newInstance(json, scale, composition, ValueFactory.INSTANCE)
           .parseJson();
diff --git a/lottie/src/main/java/com/airbnb/lottie/AnimatableIntegerValue.java b/lottie/src/main/java/com/airbnb/lottie/AnimatableIntegerValue.java
index a1420bf..faf18bf 100644
--- a/lottie/src/main/java/com/airbnb/lottie/AnimatableIntegerValue.java
+++ b/lottie/src/main/java/com/airbnb/lottie/AnimatableIntegerValue.java
@@ -1,5 +1,7 @@
 package com.airbnb.lottie;
 
+import android.util.Log;
+
 import org.json.JSONObject;
 
 import java.util.List;
@@ -35,6 +37,9 @@
 
     static AnimatableIntegerValue newInstance(
         JSONObject json, LottieComposition composition) {
+      if (json.has("x")) {
+        Log.w(L.TAG, "Animation has expressions which are not supported.");
+      }
       AnimatableValueParser.Result<Integer> result = AnimatableValueParser
           .newInstance(json, 1, composition, ValueFactory.INSTANCE)
           .parseJson();