diff --git a/CMakeLists.txt b/CMakeLists.txt
index 38ce0d7f6..9ab53d0b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -382,7 +382,7 @@ if(USE_GCC OR USE_CLANG)
 
   set(CMAKE_REQUIRED_FLAGS "-Wl,--no-undefined")
   check_c_compiler_flag("" HAVE_NO_UNDEFINED)
-  set(CMAKE_REQUIRED_FLAGS)
+  set(CMAKE_REQUIRED_FLAGS ${ORIG_CMAKE_REQUIRED_FLAGS})
   if(HAVE_NO_UNDEFINED)
     list(APPEND EXTRA_LDFLAGS "-Wl,--no-undefined")
   endif()