diff --git a/include/sys/resource.h b/include/sys/resource.h
index 83a5d515bdb..337a1ca7f36 100644
--- a/include/sys/resource.h
+++ b/include/sys/resource.h
@@ -115,10 +115,24 @@ struct rusage
  * Public Function Prototypes
  ****************************************************************************/
 
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
 int  getpriority(int which, id_t who);
 int  getrlimit(int resource, FAR struct rlimit *rlp);
 int  getrusage(int who, FAR struct rusage *r_usage);
 int  setpriority(int which, id_t who, int value);
 int  setrlimit(int resource, FAR const struct rlimit *rlp);
 
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
 #endif /* __INCLUDE_SYS_RESOURCE_H */