diff --git a/tools/cmake/tools.cmake b/tools/cmake/tools.cmake
index 727417b3..ef07190c 100644
--- a/tools/cmake/tools.cmake
+++ b/tools/cmake/tools.cmake
@@ -217,12 +217,10 @@ function(check_add_library target_name directory)
         if(NOT TARGET ${target_name})
         add_subdirectory(${directory} ${CMAKE_SOURCE_DIR}/build/libraries/${target_name})
         endif()
-    elseif()
-        if(EXISTS ${target_name})
+    elseif(EXISTS ${target_name})
         get_filename_component(lib_relative_dir ${target_name} DIRECTORY)
         get_filename_component(library_name ${target_name} NAME_WE)
         message(STATUS "[register extern library component: ${library_name}], path:${lib_relative_dir}")
-        endif()
     else()
     message(FATAL_ERROR "both ${target_name} and ${directory} is not exist")
     endif()