diff --git a/bridge/fdb.c b/bridge/fdb.c
index bd7e4f92..5ea50abb 100644
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -163,6 +163,8 @@ int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 		fprintf(fp, "offload ");
 
 	fprintf(fp, "%s\n", state_n2a(r->ndm_state));
+	fflush(fp);
+
 	return 0;
 }
 
diff --git a/bridge/mdb.c b/bridge/mdb.c
index b14bd019..24c49035 100644
--- a/bridge/mdb.c
+++ b/bridge/mdb.c
@@ -135,6 +135,8 @@ int print_mdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 		}
 	}
 
+	fflush(fp);
+
 	return 0;
 }