diff --git a/kcms/kfontinst/config-fontinst.h.cmake b/kcms/kfontinst/config-fontinst.h.cmake
index f2e6014..b44e8de 100644
--- a/kcms/kfontinst/config-fontinst.h.cmake
+++ b/kcms/kfontinst/config-fontinst.h.cmake
@@ -1,7 +1,7 @@
 #ifndef __CONFIG_FONTINST_H__
 #define __CONFIG_FONTINST_H__
 
-#define KFONTINST_LIB_EXEC_DIR "${CMAKE_INSTALL_PREFIX}/${KAUTH_HELPER_INSTALL_DIR}"
+#define KFONTINST_LIB_EXEC_DIR "${KAUTH_HELPER_INSTALL_DIR}"
 
 /* Define to 1 if you have the <locale.h> header file. */
 #cmakedefine HAVE_LOCALE_H 1
diff --git a/kcms/kfontinst/dbus/org.kde.fontinst.service.cmake b/kcms/kfontinst/dbus/org.kde.fontinst.service.cmake
index e212a88..a2915b5 100644
--- a/kcms/kfontinst/dbus/org.kde.fontinst.service.cmake
+++ b/kcms/kfontinst/dbus/org.kde.fontinst.service.cmake
@@ -1,4 +1,4 @@
 [D-BUS Service]
 Name=org.kde.fontinst
-Exec=@CMAKE_INSTALL_PREFIX@/@KAUTH_HELPER_INSTALL_DIR@/fontinst
+Exec=@KAUTH_HELPER_INSTALL_DIR@/fontinst
 
diff --git a/kcms/kfontinst/dbus/org.kde.fontinst.system-service.cmake b/kcms/kfontinst/dbus/org.kde.fontinst.system-service.cmake
index be6927f..c8b540f 100644
--- a/kcms/kfontinst/dbus/org.kde.fontinst.system-service.cmake
+++ b/kcms/kfontinst/dbus/org.kde.fontinst.system-service.cmake
@@ -1,5 +1,5 @@
 [D-BUS Service]
 Name=org.kde.fontinst
-Exec=@CMAKE_INSTALL_PREFIX@/@KAUTH_HELPER_INSTALL_DIR@/fontinst
+Exec=@KAUTH_HELPER_INSTALL_DIR/fontinst
 User=root