diff --git a/KF5DBusAddonsMacros.cmake b/KF5DBusAddonsMacros.cmake
index c7117e5..76ffecb 100644
--- a/KF5DBusAddonsMacros.cmake
+++ b/KF5DBusAddonsMacros.cmake
@@ -1,40 +1,40 @@
 set(_KDBUSADDONSDIR ${CMAKE_CURRENT_LIST_DIR})
 
 #
 # kdbusaddons_generate_dbus_service_file(EXECUTABLE NAME PATH)
 #
 # This function generates a D-Bus service file and installs it
 # into the specified destination.
 #
 # On Windows the path is not used because D-Bus service executables
 # are always installed in the same directory as dbus-daemon.
 #
 # Parameters:
 #
 # EXECUTABLE - name of the executable
 # NAME       - service path in D-Bus
 # PATH       - path to install the service file
 #
 # Example:
 #
 #  kdbusaddons_generate_dbus_service_file(kded5 org.kde.kded5 ${KDE_INSTALL_FULL_BINDIR})
 #
 function(KDBUSADDONS_GENERATE_DBUS_SERVICE_FILE _executable _name _path)
     set(_file ${CMAKE_CURRENT_BINARY_DIR}/${_name}.service)
     set(_template ${_KDBUSADDONSDIR}/KF5dbus.service.in)
     set(NAME ${_name})
     if(WIN32)
         set(EXEC ${_executable})
     else()
-        if(IS_ABSOLUTE _path)
+        if(IS_ABSOLUTE ${_path})
             set(EXEC ${_path}/${_executable})
         else()
             message(FATAL_ERROR "Path ${_path} is not absolute")
         endif()
     endif()
     if(NOT EXISTS ${_file})
         message(STATUS "generating ${_file} from ${_template}")
     endif()
     configure_file(${_template} ${_file})
     install(FILES ${_file} DESTINATION ${KDE_INSTALL_DBUSSERVICEDIR})
 endfunction()