diff --git a/include/openssl/miracl.h b/include/openssl/miracl.h
index 3fd638d1..1b8a5b16 100644
--- a/include/openssl/miracl.h
+++ b/include/openssl/miracl.h
@@ -32,8 +32,8 @@ the CertiVox MIRACL Crypto SDK with a closed source product.               *
                                                                            *
 ***************************************************************************/
 
-#ifndef MIRACL_H
-#define MIRACL_H
+#ifndef HEADER_MIRACL_H
+#define HEADER_MIRACL_H
 
 /*
  *   main MIRACL header - miracl.h.
@@ -45,6 +45,10 @@ the CertiVox MIRACL Crypto SDK with a closed source product.               *
 
 /* Use a smaller buffer if space is limited, don't be so wasteful! */
 
+#ifdef __cplusplus
+extern "C"{
+#endif
+
 #ifdef MR_STATIC
 #define MR_DEFAULT_BUFFER_SIZE 260
 #else
@@ -1506,6 +1510,10 @@ functions. But it works!
 
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 
 
 /*