diff --git a/src/bn_c_impl.hpp b/include/mcl/impl/bn_c_impl.hpp
similarity index 99%
rename from src/bn_c_impl.hpp
rename to include/mcl/impl/bn_c_impl.hpp
index a31b4f8..7d92fe6 100644
--- a/src/bn_c_impl.hpp
+++ b/include/mcl/impl/bn_c_impl.hpp
@@ -1,3 +1,7 @@
+/*
+	This is an internal header
+	Do not include this
+*/
 #define MCLBN_DLL_EXPORT
 #include <mcl/bn.h>
 
diff --git a/src/bn_c256.cpp b/src/bn_c256.cpp
index 5c30074..2f975a2 100644
--- a/src/bn_c256.cpp
+++ b/src/bn_c256.cpp
@@ -2,5 +2,5 @@
 	implementation of mclBn_* apis
 */
 #define MCLBN_FP_UNIT_SIZE 4
-#include "bn_c_impl.hpp"
+#include "mcl/impl/bn_c_impl.hpp"
 
diff --git a/src/bn_c384.cpp b/src/bn_c384.cpp
index 067e728..934a078 100644
--- a/src/bn_c384.cpp
+++ b/src/bn_c384.cpp
@@ -3,5 +3,5 @@
 */
 #define MCLBN_FP_UNIT_SIZE 6
 #define MCLBN_FR_UNIT_SIZE 6
-#include "bn_c_impl.hpp"
+#include "mcl/impl/bn_c_impl.hpp"
 
diff --git a/src/bn_c384_256.cpp b/src/bn_c384_256.cpp
index 5630e83..ecd968e 100644
--- a/src/bn_c384_256.cpp
+++ b/src/bn_c384_256.cpp
@@ -3,5 +3,5 @@
 */
 #define MCLBN_FP_UNIT_SIZE 6
 #define MCLBN_FR_UNIT_SIZE 4
-#include "bn_c_impl.hpp"
+#include "mcl/impl/bn_c_impl.hpp"
 
diff --git a/src/bn_c512.cpp b/src/bn_c512.cpp
index 90be2d9..7c10295 100644
--- a/src/bn_c512.cpp
+++ b/src/bn_c512.cpp
@@ -2,5 +2,5 @@
 	implementation of mclBn_* apis
 */
 #define MCLBN_FP_UNIT_SIZE 8
-#include "bn_c_impl.hpp"
+#include "mcl/impl/bn_c_impl.hpp"
 
diff --git a/src/she_c_impl.hpp b/src/she_c_impl.hpp
index 723765a..073bc2b 100644
--- a/src/she_c_impl.hpp
+++ b/src/she_c_impl.hpp
@@ -5,7 +5,7 @@
 #include <iosfwd>
 #include <stdint.h>
 #include <memory.h>
-#include "../src/bn_c_impl.hpp"
+#include "mcl/impl/bn_c_impl.hpp"
 #define MCLSHE_DLL_EXPORT
 
 #include <mcl/she.h>