Remove duplicate #include

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
diff --git a/ChangeLog b/ChangeLog
index 661eb82..71d21d0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 mbed TLS ChangeLog (Sorted per branch, date)
 
+= mbed TLS x.x.x branch released xxxx-xx-xx
+
+Bugfix
+   * Remove a duplicate #include in a sample program. Fixed by Masashi Honma #2326.
+
 = mbed TLS 2.7.9 branch released 2018-12-21
 
 Bugfix
diff --git a/programs/pkey/rsa_sign_pss.c b/programs/pkey/rsa_sign_pss.c
index b0b0f7e..e1c8ef6 100644
--- a/programs/pkey/rsa_sign_pss.c
+++ b/programs/pkey/rsa_sign_pss.c
@@ -54,7 +54,6 @@
 #include "mbedtls/ctr_drbg.h"
 #include "mbedtls/md.h"
 #include "mbedtls/rsa.h"
-#include "mbedtls/md.h"
 #include "mbedtls/x509.h"
 
 #include <stdio.h>