diff --git a/src/main/java/com/github/dockerjava/api/model/ResponseItem.java b/src/main/java/com/github/dockerjava/api/model/ResponseItem.java
index 586a49d63..12a090db8 100644
--- a/src/main/java/com/github/dockerjava/api/model/ResponseItem.java
+++ b/src/main/java/com/github/dockerjava/api/model/ResponseItem.java
@@ -1,15 +1,14 @@
 package com.github.dockerjava.api.model;
 
-import java.io.Serializable;
-
-import javax.annotation.CheckForNull;
-
-import org.apache.commons.lang.builder.ToStringBuilder;
-import org.apache.commons.lang.builder.ToStringStyle;
-
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.github.dockerjava.core.RemoteApiVersion;
+import org.apache.commons.lang.builder.ToStringBuilder;
+import org.apache.commons.lang.builder.ToStringStyle;
+
+import javax.annotation.CheckForNull;
+import java.io.Serializable;
 
 /**
  * Represents a pull response stream item
@@ -48,6 +47,12 @@ public class ResponseItem implements Serializable {
     @JsonProperty("error")
     private String error;
 
+    /**
+     * @since {@link RemoteApiVersion#VERSION_1_22}
+     */
+    @JsonProperty("aux")
+    private AuxDetail aux;
+
     @CheckForNull
     public String getStream() {
         return stream;
@@ -94,6 +99,14 @@ public String getError() {
         return error;
     }
 
+    /**
+     * @see #aux
+     */
+    @CheckForNull
+    public AuxDetail getAux() {
+        return aux;
+    }
+
     /**
      * Returns whether the error field indicates an error
      *
@@ -135,7 +148,7 @@ public Long getStart() {
 
         @Override
         public String toString() {
-            return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE).toString();
+            return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
         }
     }
 
@@ -161,12 +174,46 @@ public String getMessage() {
 
         @Override
         public String toString() {
-            return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE).toString();
+            return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
+        }
+    }
+
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    public static class AuxDetail implements Serializable {
+        private static final long serialVersionUID = 1L;
+
+        @JsonProperty("Size")
+        private Integer size;
+
+        @JsonProperty("Tag")
+        private String tag;
+
+        @JsonProperty("Digest")
+        private String digest;
+
+        @CheckForNull
+        public Integer getSize() {
+            return size;
+        }
+
+        @CheckForNull
+        public String getTag() {
+            return tag;
+        }
+
+        @CheckForNull
+        public String getDigest() {
+            return digest;
+        }
+
+        @Override
+        public String toString() {
+            return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
         }
     }
 
     @Override
     public String toString() {
-        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE).toString();
+        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
     }
 }