diff --git a/scripts/data_files/error.fmt b/scripts/data_files/error.fmt
index b7bfbf20f..1b5bb7af8 100644
--- a/scripts/data_files/error.fmt
+++ b/scripts/data_files/error.fmt
@@ -28,14 +28,14 @@
 
 #if defined(POLARSSL_ERROR_C) || defined(POLARSSL_ERROR_STRERROR_DUMMY)
 #include "polarssl/error.h"
+#include <string.h>
 #endif
 
 #if defined(POLARSSL_ERROR_C)
 
-HEADER_INCLUDED
 #include <stdio.h>
-#include <string.h>
 
+HEADER_INCLUDED
 #if defined(_MSC_VER) && !defined  snprintf && !defined(EFIX64) && \
     !defined(EFI32)
 #define  snprintf  _snprintf
@@ -114,8 +114,6 @@ void error_strerror( int ret, char *buf, size_t buflen )
 
 #if defined(POLARSSL_ERROR_STRERROR_DUMMY)
 
-#include <string.h>
-
 /*
  * Provide an non-function in case POLARSSL_ERROR_C is not defined
  */