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-rw-r--r--selftest/socket_wrapper.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/selftest/socket_wrapper.py b/selftest/socket_wrapper.py
index 78e90e0883..371bad958f 100644
--- a/selftest/socket_wrapper.py
+++ b/selftest/socket_wrapper.py
@@ -58,4 +58,4 @@ def setup_pcap(pcap_file):
os.environ["SOCKET_WRAPPER_PCAP_FILE"] = pcap_file
def set_default_iface(i):
- os.environ["SOCKET_WRAPPER_DEFAULT_IFACE"] = i
+ os.environ["SOCKET_WRAPPER_DEFAULT_IFACE"] = str(i)