diff --git a/tools/scripts/sign.exp b/tools/scripts/sign.exp
index 68167ac1aa..56c4da4b52 100755
--- a/tools/scripts/sign.exp
+++ b/tools/scripts/sign.exp
@@ -28,6 +28,10 @@ expect {
         send -- "$passphrase\r"
         exp_continue
     }
+    -nocase "enter pass phrase:" {
+        send -- "$passphrase\r"
+        exp_continue
+    }
     timeout {
         puts "expect timeout"
         exit 1