diff --git a/mobile/android/base/jni-generator.py b/mobile/android/base/jni-generator.py
index 577cea059b3..ddcbb9e1d1b 100644
--- a/mobile/android/base/jni-generator.py
+++ b/mobile/android/base/jni-generator.py
@@ -67,7 +67,7 @@ class Generator:
                 paramNames = ['arg%d' % i for i in range(0, len(paramTypes))]
                 if returnType == 'void':
                     returnValue = ''
-                elif returnType == 'jobject':
+                elif returnType in ('jobject', 'jstring'):
                     returnValue = 'NULL'
                 elif returnType in ('jint', 'jfloat', 'jdouble', 'jlong'):
                     returnValue = '0'