diff --git a/android/build.gradle b/android/build.gradle
index 5e96eec..7afb07c 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -81,6 +81,7 @@ android {
     task buildpEpEngine(type:Exec) {
         workingDir pEpEngineAndroid
         environment['GPGME_INCLUDE_PATH'] = externalIncludePath
+        environment['LIBETPAN_PATH'] = libetpanAndroid.absolutePath
         commandLine './build.sh'
     }
     if(buildAutomatic=="true"){