diff --git a/chrome/android/java/src/org/chromium/chrome/browser/RepostFormWarningDialog.java b/chrome/android/java/src/org/chromium/chrome/browser/RepostFormWarningDialog.java
index 669a56fa23553..9d7d0bb946326 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/RepostFormWarningDialog.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/RepostFormWarningDialog.java
@@ -91,6 +91,12 @@ public void onClick(DialogInterface dialog, int id) {
         return dialog;
     }
 
+    @Override
+    public void dismiss() {
+        if (getFragmentManager() == null) return;
+        super.dismiss();
+    }
+
     @Override
     public void onDismiss(DialogInterface dialog) {
         super.onDismiss(dialog);