diff --git a/app/build.gradle b/app/build.gradle
index d4115f46e..1a82ff460 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -25,12 +25,16 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
             signingConfig signingConfigs.release
         }
+        fdroid {
+            initWith debug
+        }
     }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
         debug.java.srcDirs += 'src/debug/kotlin'
         release.java.srcDirs += 'src/release/kotlin'
+        fdroid.java.srcDirs += 'src/fdroid/kotlin'
     }
 
     lintOptions {
diff --git a/app/src/fdroid/kotlin/com/simplemobiletools/calendar/BuildVariantApplication.kt b/app/src/fdroid/kotlin/com/simplemobiletools/calendar/BuildVariantApplication.kt
new file mode 100644
index 000000000..79e64e374
--- /dev/null
+++ b/app/src/fdroid/kotlin/com/simplemobiletools/calendar/BuildVariantApplication.kt
@@ -0,0 +1,3 @@
+package com.simplemobiletools.calendar
+
+open class BuildVariantApplication : BaseApp()