diff --git a/include/LightGBM/R_object_helper.h b/include/LightGBM/R_object_helper.h
index a5e9c5d61604..a3cf2f32ea77 100644
--- a/include/LightGBM/R_object_helper.h
+++ b/include/LightGBM/R_object_helper.h
@@ -15,12 +15,6 @@
 
 #include <cstdint>
 
-#ifdef LGB_R_BUILD
-  #define R_NO_REMAP
-  #define R_USE_C99_IN_CXX
-  #include <Rinternals.h>
-#endif
-
 #define TYPE_BITS 5
 // use .Internal(internalsID()) to uuid
 #define R_INTERNALS_UUID "2fdf6c18-697a-4ba7-b8ef-11c0d92f1327"
diff --git a/include/LightGBM/lightgbm_R.h b/include/LightGBM/lightgbm_R.h
index 2ac05384d87e..076ea2946384 100644
--- a/include/LightGBM/lightgbm_R.h
+++ b/include/LightGBM/lightgbm_R.h
@@ -8,10 +8,6 @@
 #include <LightGBM/c_api.h>
 #include <LightGBM/R_object_helper.h>
 
-#define R_NO_REMAP
-#define R_USE_C99_IN_CXX
-#include <Rinternals.h>
-
 /*!
 * \brief get string message of the last error
 *  all functions in this file will return 0 on success