diff --git a/security/plasma5-kscreenlocker/files/kde.pam.in b/security/plasma5-kscreenlocker/files/kde.pam.in
index e68b9a842582..61eb6427f94f 100644
--- a/security/plasma5-kscreenlocker/files/kde.pam.in
+++ b/security/plasma5-kscreenlocker/files/kde.pam.in
@@ -1,3 +1,3 @@
-auth	sufficient	pam_exec.so	return_prog_exit_status expose_authtok %%PREFIX%%/libexec/unix-selfauth-helper
+auth	sufficient	pam_exec.so	return_prog_exit_status expose_authtok %%LOCALBASE%%/libexec/unix-selfauth-helper
 auth	include		system
 account	include		system