diff --git a/OpenKeychain/build.gradle b/OpenKeychain/build.gradle
index e3919fae6..fb882c572 100644
--- a/OpenKeychain/build.gradle
+++ b/OpenKeychain/build.gradle
@@ -220,6 +220,8 @@ android {
             buildConfigField "String", "PAYPAL_USER", "null"
             buildConfigField "String", "PAYPAL_CURRENCY_CODE", "null"
             buildConfigField "String", "BITCOIN_ADDRESS", "null"
+            buildConfigField "String", "FLATTR_PROJECT_URL", "null"
+            buildConfigField "String", "FLATTR_URL", "null"
         }
         fdroid {
             buildConfigField "boolean", "DONATIONS_GOOGLE", "false"
@@ -227,6 +229,8 @@ android {
             buildConfigField "String", "PAYPAL_USER", "\"dominik@sufficientlysecure.org\""
             buildConfigField "String", "PAYPAL_CURRENCY_CODE", "\"EUR\""
             buildConfigField "String", "BITCOIN_ADDRESS", "\"1JZfAKTbTU5LJTkDELhPUF4Xa6VstEZgz6\""
+            buildConfigField "String", "FLATTR_PROJECT_URL", "\"https://www.openkeychain.org\""
+            buildConfigField "String", "FLATTR_URL", "\"flattr.com/submit/auto?fid=4vzg0p&url=https%3A%2F%2Fwww.openkeychain.org\""
         }
     }
 
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/HelpActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/HelpActivity.java
index c67e97440..fd7242a42 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/HelpActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/HelpActivity.java
@@ -104,6 +104,9 @@ public class HelpActivity extends BaseActivity {
             donationsBundle.putString(DonationsFragment.ARG_PAYPAL_USER, BuildConfig.PAYPAL_USER);
             donationsBundle.putString(DonationsFragment.ARG_PAYPAL_ITEM_NAME,
                     getString(R.string.help_donation_paypal_item));
+            donationsBundle.putBoolean(DonationsFragment.ARG_FLATTR_ENABLED, true);
+            donationsBundle.putString(DonationsFragment.ARG_FLATTR_PROJECT_URL, BuildConfig.FLATTR_PROJECT_URL);
+            donationsBundle.putString(DonationsFragment.ARG_FLATTR_URL, BuildConfig.FLATTR_URL);
             donationsBundle.putBoolean(DonationsFragment.ARG_BITCOIN_ENABLED, true);
             donationsBundle.putString(DonationsFragment.ARG_BITCOIN_ADDRESS, BuildConfig.BITCOIN_ADDRESS);
         }