diff --git a/ctaocrypt/benchmark/benchmark.c b/ctaocrypt/benchmark/benchmark.c
index 22770c150..f6f9c921d 100644
--- a/ctaocrypt/benchmark/benchmark.c
+++ b/ctaocrypt/benchmark/benchmark.c
@@ -11,7 +11,7 @@
 #include "ctc_aes.h"
 #include "ctc_md5.h"
 #include "ctc_sha.h"
-#include "sha256.h"
+#include "ctc_sha256.h"
 #include "sha512.h"
 #include "ctc_rsa.h"
 #include "ctc_asn.h"
diff --git a/ctaocrypt/include/ctc_hmac.h b/ctaocrypt/include/ctc_hmac.h
index 12deecf71..571a8ccc9 100644
--- a/ctaocrypt/include/ctc_hmac.h
+++ b/ctaocrypt/include/ctc_hmac.h
@@ -28,7 +28,7 @@
 #include "ctc_sha.h"
 
 #ifndef NO_SHA256
-    #include "sha256.h"
+    #include "ctc_sha256.h"
 #endif
 
 #ifdef __cplusplus
diff --git a/ctaocrypt/include/sha256.h b/ctaocrypt/include/ctc_sha256.h
similarity index 99%
rename from ctaocrypt/include/sha256.h
rename to ctaocrypt/include/ctc_sha256.h
index 24ad83901..7b080bf40 100644
--- a/ctaocrypt/include/sha256.h
+++ b/ctaocrypt/include/ctc_sha256.h
@@ -1,4 +1,4 @@
-/* sha256.h
+/* ctc_sha256.h
  *
  * Copyright (C) 2006-2011 Sawtooth Consulting Ltd.
  *
diff --git a/ctaocrypt/src/asn.c b/ctaocrypt/src/asn.c
index 951655f79..1b06339e1 100644
--- a/ctaocrypt/src/asn.c
+++ b/ctaocrypt/src/asn.c
@@ -31,7 +31,7 @@
 #include "ctc_error.h"
 #include "ctc_pwdbased.h"
 #include "ctc_des3.h"
-#include "sha256.h"
+#include "ctc_sha256.h"
 #include "logging.h"
 
 #ifdef HAVE_NTRU
diff --git a/ctaocrypt/src/sha256.c b/ctaocrypt/src/sha256.c
index 0d6bd9a0d..36d5ffddb 100644
--- a/ctaocrypt/src/sha256.c
+++ b/ctaocrypt/src/sha256.c
@@ -25,7 +25,7 @@
 
 #ifndef NO_SHA256
 
-#include "sha256.h"
+#include "ctc_sha256.h"
 #ifdef NO_INLINE
     #include "ctc_misc.h"
 #else
diff --git a/ctaocrypt/test/test.c b/ctaocrypt/test/test.c
index e877ce008..592b9d544 100644
--- a/ctaocrypt/test/test.c
+++ b/ctaocrypt/test/test.c
@@ -8,7 +8,7 @@
 #include "ctc_md5.h"
 #include "ctc_md4.h"
 #include "ctc_sha.h"
-#include "sha256.h"
+#include "ctc_sha256.h"
 #include "sha512.h"
 #include "ctc_arc4.h"
 #include "ctc_random.h"
diff --git a/include/cyassl_int.h b/include/cyassl_int.h
index 1ae4b4806..6de974abb 100644
--- a/include/cyassl_int.h
+++ b/include/cyassl_int.h
@@ -38,7 +38,7 @@
     #include "ctc_ecc.h"
 #endif
 #ifndef NO_SHA256
-    #include "sha256.h"
+    #include "ctc_sha256.h"
 #endif
 
 #ifdef CYASSL_CALLBACKS