diff --git a/rsaref/rsaref.h b/rsaref/rsaref.h
index 817c6cec751df07cb2fa898ea32c3ea415254a15..15f65dd94f8d2b7e1e447ce8709e32f0d7a44d75 100644
--- a/rsaref/rsaref.h
+++ b/rsaref/rsaref.h
@@ -59,6 +59,10 @@
 #ifndef HEADER_RSAREF_H
 #define HEADER_RSAREF_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+ 
 #ifndef NO_RSA
 #include <openssl/rsa.h>