diff -Nur keychain-2.7.0/keychain.sh keychain-2.7.0-b/keychain.sh
--- keychain-2.7.0/keychain.sh	2009-10-23 22:23:07.000000000 +0200
+++ keychain-2.7.0-b/keychain.sh	2010-04-11 22:58:25.570963964 +0200
@@ -767,6 +767,8 @@
 gpg_listmissing() {
     unset glm_missing
 
+    GPG_TTY=`tty`
+
     # Parse $gpgkeys into positional params to preserve spaces in filenames
     set -f          # disable globbing
     glm_IFS="$IFS"  # save current IFS
@@ -778,7 +780,7 @@
 
     for glm_k in "$@"; do
         # Check if this key is known to the agent.  Don't know another way...
-        if echo | env -i PATH="$PATH" GPG_AGENT_INFO="$GPG_AGENT_INFO" \
+        if echo | env -i GPG_TTY="$GPG_TTY" PATH="$PATH" GPG_AGENT_INFO="$GPG_AGENT_INFO" \
                 gpg --no-options --use-agent --no-tty --sign --local-user "$glm_k" -o- >/dev/null 2>&1; then
             # already know about this key
             mesg "Known gpg key: ${CYANN}${glm_k}${OFF}"
