diff --git a/src/lib_json/CMakeLists.txt b/src/lib_json/CMakeLists.txt
index e22fb1c..f237720 100644
--- a/src/lib_json/CMakeLists.txt
+++ b/src/lib_json/CMakeLists.txt
@@ -1,4 +1,4 @@
-if(CMAKE_COMPILER_IS_GNUCXX)
+if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     #Get compiler version.
     execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion
         OUTPUT_VARIABLE GNUCXX_VERSION