diff --git a/src/netbase.cpp b/src/netbase.cpp
index d44645821c282..5c704f3b772d6 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -709,7 +709,7 @@ bool IsBadPort(uint16_t port)
 {
     /* Don't forget to update doc/p2p-bad-ports.md if you change this list. */
 
-    if (port <= PRIVILEGED_PORTS_THRESHOLD) return true;
+    if (port > 0 && port <= PRIVILEGED_PORTS_THRESHOLD) return true;
     switch (port) {
     case 1719:  // h323gatestat
     case 1720:  // h323hostcall
diff --git a/src/test/netbase_tests.cpp b/src/test/netbase_tests.cpp
index 950c58a20865f..54de53fd480e5 100644
--- a/src/test/netbase_tests.cpp
+++ b/src/test/netbase_tests.cpp
@@ -450,6 +450,7 @@ BOOST_AUTO_TEST_CASE(isbadport)
     BOOST_CHECK(IsBadPort(18332));
     BOOST_CHECK(IsBadPort(18333));
 
+    BOOST_CHECK(!IsBadPort(0));
     BOOST_CHECK(!IsBadPort(9998));
     BOOST_CHECK(!IsBadPort(9999));
     BOOST_CHECK(!IsBadPort(26656));