fix path
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f19143..5a2d368 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1132,11 +1132,11 @@
   include/grpc++/completion_queue.h
   include/grpc++/create_channel.h
   include/grpc++/create_channel_posix.h
-  include/grpc++/ext/health_check_service_interface.h
   include/grpc++/ext/health_check_service_server_builder_option.h
   include/grpc++/generic/async_generic_service.h
   include/grpc++/generic/generic_stub.h
   include/grpc++/grpc++.h
+  include/grpc++/health_check_service_interface.h
   include/grpc++/impl/call.h
   include/grpc++/impl/client_unary_call.h
   include/grpc++/impl/codegen/core_codegen.h
@@ -1471,11 +1471,11 @@
   include/grpc++/completion_queue.h
   include/grpc++/create_channel.h
   include/grpc++/create_channel_posix.h
-  include/grpc++/ext/health_check_service_interface.h
   include/grpc++/ext/health_check_service_server_builder_option.h
   include/grpc++/generic/async_generic_service.h
   include/grpc++/generic/generic_stub.h
   include/grpc++/grpc++.h
+  include/grpc++/health_check_service_interface.h
   include/grpc++/impl/call.h
   include/grpc++/impl/client_unary_call.h
   include/grpc++/impl/codegen/core_codegen.h
@@ -1683,11 +1683,11 @@
   include/grpc++/completion_queue.h
   include/grpc++/create_channel.h
   include/grpc++/create_channel_posix.h
-  include/grpc++/ext/health_check_service_interface.h
   include/grpc++/ext/health_check_service_server_builder_option.h
   include/grpc++/generic/async_generic_service.h
   include/grpc++/generic/generic_stub.h
   include/grpc++/grpc++.h
+  include/grpc++/health_check_service_interface.h
   include/grpc++/impl/call.h
   include/grpc++/impl/client_unary_call.h
   include/grpc++/impl/codegen/core_codegen.h