diff --git a/CMakeLists.txt b/CMakeLists.txt
index f13231586..128551b02 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -358,8 +358,12 @@ if(WITH_LTO)
     string(REGEX REPLACE ".* ([0-9.]+)\n.*" "\\1" BINUTILS_VERSION_DETECTED "${BINUTILS_VERSION_DETECTED}")
     if("${BINUTILS_VERSION_DETECTED}" VERSION_LESS "${BINUTILS_VERSION_MININUM}")
         if(APPLE)
-            set(CMAKE_AR "/opt/local/bin/ar")
-            set(CMAKE_RANLIB "/opt/local/bin/ranlib")
+            if(!CMAKE_AR)
+                set(CMAKE_AR "/opt/local/bin/ar")
+            endif()
+            if(!CMAKE_RANLIB)
+                set(CMAKE_RANLIB "/opt/local/bin/ranlib")
+            endif()
         else()
             set(CMAKE_AR "/usr/bin/gcc-ar")
             set(CMAKE_RANLIB "/usr/bin/gcc-ranlib")