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-rw-r--r--src/trex_port_attr.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/trex_port_attr.cpp b/src/trex_port_attr.cpp
index 26199e33..20b441e2 100644
--- a/src/trex_port_attr.cpp
+++ b/src/trex_port_attr.cpp
@@ -57,7 +57,7 @@ TRexPortAttr::to_json(Json::Value &output) {
if (get_src_ipv4() != 0) {
output["src_ipv4"] = utl_uint32_to_ipv4(get_src_ipv4());
} else {
- output["src_ipv4"] = "none";
+ output["src_ipv4"] = Json::nullValue;
}