diff --git a/fdroidserver/common.py b/fdroidserver/common.py
index d77ae57d..8d7d32b3 100644
--- a/fdroidserver/common.py
+++ b/fdroidserver/common.py
@@ -1206,7 +1206,7 @@ def prepare_source(vcs, app, build, build_dir, srclib_dir, extlib_dir, onserver=
         else:
             props += "sdk.dir=%s\n" % config['sdk_path']
             props += "sdk-location=%s\n" % config['sdk_path']
-        if 'ndk_path' in config:
+        if config['ndk_path']:
             # Add ndk location
             props += "ndk.dir=%s\n" % config['ndk_path']
             props += "ndk-location=%s\n" % config['ndk_path']