diff --git a/src/org/fdroid/fdroid/AppDetails.java b/src/org/fdroid/fdroid/AppDetails.java
index ba1ff18e4..4cf2b64e6 100644
--- a/src/org/fdroid/fdroid/AppDetails.java
+++ b/src/org/fdroid/fdroid/AppDetails.java
@@ -74,6 +74,9 @@ public class AppDetails extends ListActivity {
 
     private static final int REQUEST_INSTALL = 0;
     private static final int REQUEST_UNINSTALL = 1;
+
+    public static final String EXTRA_APPID = "appid";
+
     private ApkListAdapter adapter;
 
     private static class ViewHolder {
@@ -287,10 +290,10 @@ public class AppDetails extends ListActivity {
             }
             Log.d("FDroid", "AppDetails launched from link, for '" + appid
                     + "'");
-        } else if (!i.hasExtra("appid")) {
+        } else if (!i.hasExtra(EXTRA_APPID)) {
             Log.d("FDroid", "No application ID in AppDetails!?");
         } else {
-            appid = i.getStringExtra("appid");
+            appid = i.getStringExtra(EXTRA_APPID);
         }
 
         if (i.hasExtra("from")) {
diff --git a/src/org/fdroid/fdroid/FDroid.java b/src/org/fdroid/fdroid/FDroid.java
index 08b6e3609..8dc53721d 100644
--- a/src/org/fdroid/fdroid/FDroid.java
+++ b/src/org/fdroid/fdroid/FDroid.java
@@ -106,7 +106,7 @@ public class FDroid extends FragmentActivity {
         }
         if (appid != null && appid.length() > 0) {
             Intent call = new Intent(this, AppDetails.class);
-            call.putExtra("appid", appid);
+            call.putExtra(AppDetails.EXTRA_APPID, appid);
             startActivityForResult(call, REQUEST_APPDETAILS);
         }
 
diff --git a/src/org/fdroid/fdroid/SearchResults.java b/src/org/fdroid/fdroid/SearchResults.java
index 01adb01b1..8f62100ba 100644
--- a/src/org/fdroid/fdroid/SearchResults.java
+++ b/src/org/fdroid/fdroid/SearchResults.java
@@ -138,7 +138,7 @@ public class SearchResults extends ListActivity {
         app = new App((Cursor) adapter.getItem(position));
 
         Intent intent = new Intent(this, AppDetails.class);
-        intent.putExtra("appid", app.id);
+        intent.putExtra(AppDetails.EXTRA_APPID, app.id);
         startActivityForResult(intent, REQUEST_APPDETAILS);
         super.onListItemClick(l, v, position, id);
     }
diff --git a/src/org/fdroid/fdroid/views/fragments/AppListFragment.java b/src/org/fdroid/fdroid/views/fragments/AppListFragment.java
index c6c674575..7e6860a43 100644
--- a/src/org/fdroid/fdroid/views/fragments/AppListFragment.java
+++ b/src/org/fdroid/fdroid/views/fragments/AppListFragment.java
@@ -118,7 +118,7 @@ abstract public class AppListFragment extends ListFragment implements
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
         final App app = new App((Cursor)getListView().getItemAtPosition(position));
         Intent intent = new Intent(getActivity(), AppDetails.class);
-        intent.putExtra("appid", app.id);
+        intent.putExtra(AppDetails.EXTRA_APPID, app.id);
         intent.putExtra("from", getFromTitle());
         startActivityForResult(intent, FDroid.REQUEST_APPDETAILS);
     }