diff --git a/F-Droid/src/org/fdroid/fdroid/AppDetails.java b/F-Droid/src/org/fdroid/fdroid/AppDetails.java
index e3ee80138..fbc801f98 100644
--- a/F-Droid/src/org/fdroid/fdroid/AppDetails.java
+++ b/F-Droid/src/org/fdroid/fdroid/AppDetails.java
@@ -840,9 +840,9 @@ public class AppDetails extends AppCompatActivity implements ProgressListener, A
         if (repoaddress == null) return;
 
         if (!apk.compatible) {
-            AlertDialog.Builder ask_alrt = new AlertDialog.Builder(this);
-            ask_alrt.setMessage(R.string.installIncompatible);
-            ask_alrt.setPositiveButton(R.string.yes,
+            AlertDialog.Builder builder = new AlertDialog.Builder(this);
+            builder.setMessage(R.string.installIncompatible);
+            builder.setPositiveButton(R.string.yes,
                     new DialogInterface.OnClickListener() {
                         @Override
                         public void onClick(DialogInterface dialog,
@@ -850,14 +850,14 @@ public class AppDetails extends AppCompatActivity implements ProgressListener, A
                             startDownload(apk, repoaddress);
                         }
                     });
-            ask_alrt.setNegativeButton(R.string.no,
+            builder.setNegativeButton(R.string.no,
                     new DialogInterface.OnClickListener() {
                         @Override
                         public void onClick(DialogInterface dialog,
                                 int whichButton) {
                         }
                     });
-            AlertDialog alert = ask_alrt.create();
+            AlertDialog alert = builder.create();
             alert.show();
             return;
         }
@@ -1698,9 +1698,9 @@ public class AppDetails extends AppCompatActivity implements ProgressListener, A
             if (getApp().installedVersionCode == apk.vercode) {
                 remove();
             } else if (getApp().installedVersionCode > apk.vercode) {
-                AlertDialog.Builder ask_alrt = new AlertDialog.Builder(getActivity());
-                ask_alrt.setMessage(R.string.installDowngrade);
-                ask_alrt.setPositiveButton(R.string.yes,
+                AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+                builder.setMessage(R.string.installDowngrade);
+                builder.setPositiveButton(R.string.yes,
                         new DialogInterface.OnClickListener() {
                             @Override
                             public void onClick(DialogInterface dialog,
@@ -1708,14 +1708,14 @@ public class AppDetails extends AppCompatActivity implements ProgressListener, A
                                 install(apk);
                             }
                         });
-                ask_alrt.setNegativeButton(R.string.no,
+                builder.setNegativeButton(R.string.no,
                         new DialogInterface.OnClickListener() {
                             @Override
                             public void onClick(DialogInterface dialog,
                                     int whichButton) {
                             }
                         });
-                AlertDialog alert = ask_alrt.create();
+                AlertDialog alert = builder.create();
                 alert.show();
             } else {
                 install(apk);
diff --git a/F-Droid/src/org/fdroid/fdroid/privileged/views/AppSecurityPermissions.java b/F-Droid/src/org/fdroid/fdroid/privileged/views/AppSecurityPermissions.java
index da7bfe5b5..67c402dda 100644
--- a/F-Droid/src/org/fdroid/fdroid/privileged/views/AppSecurityPermissions.java
+++ b/F-Droid/src/org/fdroid/fdroid/privileged/views/AppSecurityPermissions.java
@@ -366,11 +366,11 @@ public class AppSecurityPermissions {
     }
 
     public int getPermissionCount(int which) {
-        int N = 0;
+        int n = 0;
         for (int i = 0; i < mPermGroupsList.size(); i++) {
-            N += getPermissionList(mPermGroupsList.get(i), which).size();
+            n += getPermissionList(mPermGroupsList.get(i), which).size();
         }
-        return N;
+        return n;
     }
 
     public View getPermissionsView(int which) {
diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index dd4f42a53..b0dc0ad6b 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -18,7 +18,7 @@
 
         <!--<module name="ConstantName" />-->
         <!--<module name="LocalFinalVariableName" />-->
-        <!--<module name="LocalVariableName" />-->
+        <module name="LocalVariableName" />
         <module name="MemberName" />
         <module name="MethodName" />
         <module name="PackageName" />