diff --git a/src/cli.c b/src/cli.c
index 720a9b4..6329db1 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -550,7 +550,9 @@
 
 	/* Check if the input buffer is avalaible. */
 	if (res->buf.size == 0) {
-		si_cant_put(si);
+		/* buf.size==0 means we failed to get a buffer and were
+		 * already subscribed to a wait list to get a buffer.
+		 */
 		goto out;
 	}