diff --git a/src/cfgparse.c b/src/cfgparse.c
index c601cbc..6a4e0bb 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -4702,6 +4702,11 @@
 			err_code |= ERR_ALERT | ERR_FATAL;
 			goto out;
 		}
+		if (*(args[2])) {
+			Alert("parsing [%s:%d] : %s expects only one argument, don't forget to escape spaces!\n", file, linenum, args[0]);
+			err_code |= ERR_ALERT | ERR_FATAL;
+			goto out;
+		}
 		free(curproxy->uniqueid_format_string);
 		curproxy->uniqueid_format_string = strdup(args[1]);
 	}
@@ -4722,6 +4727,11 @@
 			err_code |= ERR_ALERT | ERR_FATAL;
 			goto out;
 		}
+		if (*(args[2])) {
+			Alert("parsing [%s:%d] : %s expects only one argument, don't forget to escape spaces!\n", file, linenum, args[0]);
+			err_code |= ERR_ALERT | ERR_FATAL;
+			goto out;
+		}
 
 		if (curproxy->logformat_string != default_http_log_format &&
 		    curproxy->logformat_string != default_tcp_log_format &&