diff --git a/libs/esl/fs_cli.c b/libs/esl/fs_cli.c
index bab2d5b3b2..acfa0c2c3e 100644
--- a/libs/esl/fs_cli.c
+++ b/libs/esl/fs_cli.c
@@ -1674,6 +1674,8 @@ int main(int argc, char *argv[])
 		goto done;
 	}
 	history(myhistory, &ev, H_SETSIZE, 800);
+	/* Ignore duplicate lines */
+	history(myhistory, &ev, H_SETUNIQUE, 1);
 	el_set(el, EL_HIST, history, myhistory);
 	if (use_history_file) history(myhistory, &ev, H_LOAD, hfile);
 	el_source(el, NULL);