diff --git a/core/src/main/java/hudson/model/ItemGroupMixIn.java b/core/src/main/java/hudson/model/ItemGroupMixIn.java
index ff88a9b322869a2c7bbd62db53789c0751d29bff..15c1283743be14a7edb01d469255a8016ae57c25 100644
--- a/core/src/main/java/hudson/model/ItemGroupMixIn.java
+++ b/core/src/main/java/hudson/model/ItemGroupMixIn.java
@@ -146,10 +146,14 @@ public abstract class ItemGroupMixIn {
         TopLevelItem result;
 
         String requestContentType = req.getContentType();
-        if(requestContentType==null)
+        String mode = req.getParameter("mode");
+        if (requestContentType == null
+                && !(mode != null && mode.equals("copy")))
             throw new Failure("No Content-Type header set");
 
-        boolean isXmlSubmission = requestContentType.startsWith("application/xml") || requestContentType.startsWith("text/xml");
+        boolean isXmlSubmission = requestContentType != null
+            && (requestContentType.startsWith("application/xml")
+                    || requestContentType.startsWith("text/xml"));
 
         String name = req.getParameter("name");
         if(name==null)
@@ -162,7 +166,6 @@ public abstract class ItemGroupMixIn {
                 throw new Failure(Messages.Hudson_JobAlreadyExists(name));
         }
 
-        String mode = req.getParameter("mode");
         if(mode!=null && mode.equals("copy")) {
             String from = req.getParameter("from");
 
diff --git a/core/src/main/java/hudson/model/View.java b/core/src/main/java/hudson/model/View.java
index ce7910cb5520a25bf1f70f7fb55b818b64d6de11..561d178d734a03d6f286f5ff24e725d07de8ebf5 100644
--- a/core/src/main/java/hudson/model/View.java
+++ b/core/src/main/java/hudson/model/View.java
@@ -1157,18 +1157,22 @@ public abstract class View extends AbstractModelObject implements AccessControll
     
     public static View create(StaplerRequest req, StaplerResponse rsp, ViewGroup owner)
             throws FormException, IOException, ServletException {
+        String mode = req.getParameter("mode");
+
         String requestContentType = req.getContentType();
-        if(requestContentType==null)
+        if (requestContentType == null
+                && !(mode != null && mode.equals("copy")))
             throw new Failure("No Content-Type header set");
 
-        boolean isXmlSubmission = requestContentType.startsWith("application/xml") || requestContentType.startsWith("text/xml");
+        boolean isXmlSubmission = requestContentType != null
+                && (requestContentType.startsWith("application/xml")
+                        || requestContentType.startsWith("text/xml"));
 
         String name = req.getParameter("name");
         checkGoodName(name);
         if(owner.getView(name)!=null)
             throw new Failure(Messages.Hudson_ViewAlreadyExists(name));
 
-        String mode = req.getParameter("mode");
         if (mode==null || mode.length()==0) {
             if(isXmlSubmission) {
                 View v = createViewFromXML(name, req.getInputStream());
diff --git a/test/src/test/java/hudson/jobs/CreateItemTest.java b/test/src/test/java/hudson/jobs/CreateItemTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..ec0eef98d4703f67831a398851ba1c25b56f446e
--- /dev/null
+++ b/test/src/test/java/hudson/jobs/CreateItemTest.java
@@ -0,0 +1,85 @@
+/*
+ * The MIT License
+ *
+ * Copyright 2015 Christopher Simons
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package hudson.jobs;
+
+import static org.junit.Assert.assertEquals;
+
+import java.net.URL;
+import java.text.MessageFormat;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.jvnet.hudson.test.Issue;
+import org.jvnet.hudson.test.JenkinsRule;
+
+import com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException;
+import com.gargoylesoftware.htmlunit.HttpMethod;
+import com.gargoylesoftware.htmlunit.WebRequest;
+
+/**
+ * Tests the /createItem REST API.
+ *
+ * @author Christopher Simons
+ */
+public class CreateItemTest {
+    private static final int ERROR_PRESET = (-1);
+    @Rule
+    public JenkinsRule rule = new JenkinsRule();
+
+    @Before
+    public void setup() {
+        rule.jenkins.setSecurityRealm(rule.createDummySecurityRealm());
+    }
+
+    @Issue("JENKINS-31235")
+    @Test
+    public void testCreateItemFromCopy() throws Exception {
+        rule.jenkins.setCrumbIssuer(null);
+
+        String sourceJobName = "sourceJob";
+        rule.createFreeStyleProject(sourceJobName);
+
+        String newJobName = "newJob";
+        URL apiURL = new URL(MessageFormat.format(
+                    "{0}createItem?mode=copy&from={1}&name={2}",
+                    rule.getURL().toString(), sourceJobName, newJobName));
+
+        WebRequest request = new WebRequest(apiURL, HttpMethod.POST);
+        deleteContentTypeHeader(request);
+        int result = ERROR_PRESET;
+        try {
+            result = rule.createWebClient()
+                .getPage(request).getWebResponse().getStatusCode();
+        } catch (FailingHttpStatusCodeException e) {
+            result = e.getResponse().getStatusCode();
+        }
+
+        assertEquals("Creating job from copy should succeed.", 200, result);
+    }
+
+    private void deleteContentTypeHeader(WebRequest request) {
+        request.setEncodingType(null);
+    }
+}