diff --git a/library/bignum.c b/library/bignum.c
index 4ddda58..fdf8c9a 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -41,7 +41,7 @@
 #include "bn_mul.h"
 #include "mbedtls/platform_util.h"
 #include "mbedtls/error.h"
-#include "constant_time.h"
+#include "constant_time_internal.h"
 
 #include <string.h>
 
diff --git a/library/constant_time.c b/library/constant_time.c
index 84ac15c..f71f7b9 100644
--- a/library/constant_time.c
+++ b/library/constant_time.c
@@ -23,7 +23,7 @@
  */
 
 #include "common.h"
-#include "constant_time.h"
+#include "constant_time_internal.h"
 #include "mbedtls/constant_time.h"
 #include "mbedtls/error.h"
 #include "mbedtls/platform_util.h"
diff --git a/library/constant_time.h b/library/constant_time_internal.h
similarity index 100%
rename from library/constant_time.h
rename to library/constant_time_internal.h
diff --git a/library/rsa.c b/library/rsa.c
index d839d45..e3ec056 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -44,7 +44,7 @@
 #include "mbedtls/oid.h"
 #include "mbedtls/platform_util.h"
 #include "mbedtls/error.h"
-#include "constant_time.h"
+#include "constant_time_internal.h"
 #include "mbedtls/constant_time.h"
 
 #include <string.h>
diff --git a/library/ssl_msg.c b/library/ssl_msg.c
index c14634f..299be32 100644
--- a/library/ssl_msg.c
+++ b/library/ssl_msg.c
@@ -40,7 +40,7 @@
 #include "mbedtls/error.h"
 #include "mbedtls/platform_util.h"
 #include "mbedtls/version.h"
-#include "constant_time.h"
+#include "constant_time_internal.h"
 #include "mbedtls/constant_time.h"
 
 #include <string.h>
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index ab5cdea..2d2514e 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -34,7 +34,7 @@
 #include "mbedtls/debug.h"
 #include "mbedtls/error.h"
 #include "mbedtls/platform_util.h"
-#include "constant_time.h"
+#include "constant_time_internal.h"
 #include "mbedtls/constant_time.h"
 
 #include <string.h>