diff --git a/sys/ddb/db_command.c b/sys/ddb/db_command.c
--- a/sys/ddb/db_command.c
+++ b/sys/ddb/db_command.c
@@ -293,7 +293,7 @@
 			*resultp = CMD_AMBIGUOUS;
 			/* but keep looking for a full match -
 			   this lets us match single letters */
-		} else {
+		} else if (*resultp == CMD_NONE) {
 			*cmdp = cmd;
 			*resultp = CMD_FOUND;
 		}