diff --git a/src/config.h b/src/config.h
index 659b0aff3..431491953 100644
--- a/src/config.h
+++ b/src/config.h
@@ -241,6 +241,9 @@ void setproctitle(const char *fmt, ...);
 #define redis_set_thread_title(name) pthread_set_name_np(pthread_self(), name)
 #else
 #if (defined __APPLE__ && defined(MAC_OS_X_VERSION_10_7))
+#ifdef __cplusplus
+extern "C" 
+#endif
 int pthread_setname_np(const char *name);
 #include <pthread.h>
 #define redis_set_thread_title(name) pthread_setname_np(name)