diff --git a/fdroidserver/common.py b/fdroidserver/common.py
index b668ef29..fb64fce7 100644
--- a/fdroidserver/common.py
+++ b/fdroidserver/common.py
@@ -1585,7 +1585,7 @@ def SdkToolsPopen(commands, cwd=None, output=True):
     if abscmd is None:
         logging.critical("Could not find '%s' on your system" % cmd)
         sys.exit(1)
-    return FDroidPopen(abscmd + commands[1:],
+    return FDroidPopen([abscmd] + commands[1:],
                        cwd=cwd, output=output)