diff --git a/CHANGES b/CHANGES
index 6c03b00626..bc94fddaef 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+4620.	[port]		Handle EPFNOSUPPORT being returned when probing
+			to see if a socket type is supported. [RT #45214]
+
 4619.	[bug]		Call isc_mem_put instead of isc_mem_free in
 			bin/named/server.c:setup_newzones. [RT #45202]
 
diff --git a/lib/isc/unix/net.c b/lib/isc/unix/net.c
index 8f80c32ca9..daa7326884 100644
--- a/lib/isc/unix/net.c
+++ b/lib/isc/unix/net.c
@@ -138,6 +138,9 @@ try_proto(int domain) {
 #ifdef EAFNOSUPPORT
 		case EAFNOSUPPORT:
 #endif
+#ifdef EPFNOSUPPORT
+		case EPFNOSUPPORT:
+#endif
 #ifdef EPROTONOSUPPORT
 		case EPROTONOSUPPORT:
 #endif