diff --git a/src/vty/command.c b/src/vty/command.c
index 21b26b4..98d86d2 100644
--- a/src/vty/command.c
+++ b/src/vty/command.c
@@ -1950,7 +1950,7 @@
 
 		/* In case of 'command \t' pattern.  Do you need '?' command at
 		   the end of the line. */
-		if (vector_slot(vline, index) == '\0')
+		if (vector_slot(vline, index) == NULL)
 			*status = CMD_ERR_NOTHING_TODO;
 		else
 			*status = CMD_ERR_NO_MATCH;