diff --git a/src/cfgparse.c b/src/cfgparse.c
index 8df5386d6..bd720c624 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -4029,6 +4029,13 @@ int check_config_validity()
 		if (curproxy->options & PR_O_LOGASAP)
 			curproxy->to_log &= ~LW_BYTES;
 
+		if ((curproxy->mode == PR_MODE_TCP || curproxy->mode == PR_MODE_HTTP) &&
+		    (curproxy->cap & PR_CAP_FE) && curproxy->to_log && curproxy->logfac1 < 0) {
+			Warning("config : log format ignored for %s '%s' since it has no log address.\n",
+				proxy_type_str(curproxy), curproxy->id);
+			err_code |= ERR_WARN;
+		}
+
 		/*
 		 * ensure that we're not cross-dressing a TCP server into HTTP.
 		 */
diff --git a/src/log.c b/src/log.c
index 093accb28..8d71eae3f 100644
--- a/src/log.c
+++ b/src/log.c
@@ -345,20 +345,10 @@ void tcp_sess_log(struct session *s)
 
 	get_localtime(s->logs.tv_accept.tv_sec, &tm);
 
-	if (fe->logfac1 >= 0)
-		prx_log = fe;
-	/*
-	 * FIXME: should we fall back to the backend if the frontend did not
-	 * define any log ? It seems like we should not permit such complex
-	 * setups because they would induce a debugging nightmare for the
-	 * admin.
-	 */
-	// else if (be->logfac1 >= 0)
-	// prx_log = be;
-	else
-		prx_log = NULL; /* global */
+	if (fe->logfac1 < 0 && fe->logfac2 < 0)
+		return;
 
-	/* FIXME: let's limit ourselves to frontend logging for now. */
+	prx_log = fe;
 	tolog = fe->to_log;
 	svid = (tolog & LW_SVID) ? (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "-";