diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 3602967..8a85050 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,5 +1,8 @@
 Version 1.0
 ----------------------------------------------------------------------
+2009-02-24:
+	* fix for #17, setting PAM_TTY helps root
+
 2008-11-04:
 	* fix for #13, problems with 'make install' when asciidoc is not
 	  installed and thus creates no 'alock.1'
diff --git a/src/auth_pam.c b/src/auth_pam.c
index 483fb6e..cf33c34 100644
--- a/src/auth_pam.c
+++ b/src/auth_pam.c
@@ -161,6 +161,8 @@ static int alock_auth_pam_auth(const char* pass) {
     PAM_password = pass;
     pam_error = pam_start("login", PAM_username, &PAM_conversation, &pam_handle);
     PAM_YN;
+    pam_error = pam_set_item(pam_handle, PAM_TTY, ttyname(0));
+    PAM_YN;
     pam_error = pam_authenticate(pam_handle, 0);
     PAM_YN;
     pam_error = pam_end(pam_handle, pam_error);