diff --git a/tools/scripts/sign.exp b/tools/scripts/sign.exp
index c33e70bbde..68167ac1aa 100755
--- a/tools/scripts/sign.exp
+++ b/tools/scripts/sign.exp
@@ -24,7 +24,7 @@ if { [info exists env(PASSPHRASE) ] } {
 # Run the desired command
 spawn {*}$command
 expect {
-    -nocase "enter passphrase: " {
+    -nocase "enter passphrase:" {
         send -- "$passphrase\r"
         exp_continue
     }