diff --git a/src/3rd_party/CMakeLists.txt b/src/3rd_party/CMakeLists.txt
index 45c18dc4f..b8fc7c1c7 100644
--- a/src/3rd_party/CMakeLists.txt
+++ b/src/3rd_party/CMakeLists.txt
@@ -66,7 +66,7 @@ if(USE_SENTENCEPIECE)
   endif(USE_STATIC_LIBS)
 
   add_subdirectory(./sentencepiece)
-  include_directories(./sentencepiece)
+  include_directories(./sentencepiece/src)
 
   set_target_properties(spm_encode spm_decode spm_train spm_normalize spm_export_vocab
     PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}")