diff --git a/babeld/babel_interface.c b/babeld/babel_interface.c
index ceff472c2a..2cf6707123 100644
--- a/babeld/babel_interface.c
+++ b/babeld/babel_interface.c
@@ -695,6 +695,9 @@ interface_reset(struct interface *ifp)
            babel_ifp->cost,
            babel_ifp->ipv4 ? ", IPv4" : "");
 
+    if (babel_ifp->ipv4 != NULL)
+		free(babel_ifp->ipv4);
+
     return 1;
 }