diff --git a/include/nuttx/signal.h b/include/nuttx/signal.h
index f8f80d305d..04e38ca4d2 100644
--- a/include/nuttx/signal.h
+++ b/include/nuttx/signal.h
@@ -54,6 +54,11 @@ struct sigwork_s
   sigev_notify_function_t func; /* Notification function */
 };
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/
@@ -556,4 +561,8 @@ void nxsig_cancel_notification(FAR struct sigwork_s *work);
   #define nxsig_cancel_notification(work) (void)(work)
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* __INCLUDE_NUTTX_SIGNAL_H */