diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
index 2bced3c8f..eff1f7d46 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
@@ -45,6 +45,7 @@ import android.view.View;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
@@ -151,6 +152,12 @@ public class ViewKeyActivity extends ActionBarActivity implements
         }
         if (mDataUri.getHost().equals(ContactsContract.AUTHORITY)) {
             mDataUri = ContactHelper.dataUriFromContactUri(this, mDataUri);
+            if (mDataUri == null) {
+                Log.e(Constants.TAG, "Contact Data missing. Should be uri of key!");
+                Toast.makeText(this, R.string.error_contacts_key_id_missing, Toast.LENGTH_LONG).show();
+                finish();
+                return;
+            }
         }
 
         Log.i(Constants.TAG, "mDataUri: " + mDataUri.toString());
diff --git a/OpenKeychain/src/main/res/values/strings.xml b/OpenKeychain/src/main/res/values/strings.xml
index b04db2fa8..a44aaf2a6 100644
--- a/OpenKeychain/src/main/res/values/strings.xml
+++ b/OpenKeychain/src/main/res/values/strings.xml
@@ -261,6 +261,7 @@
     <string name="error_searching_keys">"An error occurred when searching for keys."</string>
     <string name="error_too_many_responses">"Key search query returned too many candidates. Please refine your query!"</string>
     <string name="error_too_short_or_too_many_responses">"Either no keys or too many have been found. Please improve your query!"</string>
+    <string name="error_contacts_key_id_missing">"Retrieving the key ID from contacts failed!"</string>
 
     <string name="error_import_no_valid_keys">"No valid keys found in File/Clipboard!"</string>
     <string name="error_generic_report_bug">"A generic error occurred, please create a new bug report for OpenKeychain."</string>