diff --git a/example/cpp11/CMakeLists.txt b/example/cpp11/CMakeLists.txt
index c932a603..eb085ed1 100644
--- a/example/cpp11/CMakeLists.txt
+++ b/example/cpp11/CMakeLists.txt
@@ -1,4 +1,4 @@
-IF (MSGPACK_CXX11)
+IF (MSGPACK_CXX11 OR MSGPACK_CXX17)
     INCLUDE_DIRECTORIES (
         ../include
     )
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 56c6b7aa..7924930c 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -55,7 +55,7 @@ IF (MSGPACK_USE_X3_PARSE)
     )
 ENDIF ()
 
-IF (MSGPACK_CXX11)
+IF (MSGPACK_CXX11 OR MSGPACK_CXX17)
     LIST (APPEND check_PROGRAMS
         iterator_cpp11.cpp
         msgpack_cpp11.cpp