diff --git a/setup/so-functions b/setup/so-functions
index 7c6feb5c6..8de1f6ee4 100755
--- a/setup/so-functions
+++ b/setup/so-functions
@@ -846,7 +846,7 @@ docker_registry() {
 	printf '%s\n'\
 		"{"\
 		"  \"registry-mirrors\": [ \"$proxy:5000\" ],"\
-		"  \"bip\": \"$DNETBIP\",\
+		"  \"bip\": \"$DNETBIP\","\
 		"  \"default-address-pools\": ["\
 		"    {"\
 		"      \"base\" : \"$DOCKERNET\","\