diff --git a/log.c b/log.c
index 32e69d45..ded3fec3 100644
--- a/log.c
+++ b/log.c
@@ -83,6 +83,14 @@ event_debug_get_logging_mask_(void)
 #endif
 #endif /* EVENT_DEBUG_LOGGING_ENABLED */
 
+void
+event_enable_debug_logging(ev_uint32_t which)
+{
+#ifdef EVENT_DEBUG_LOGGING_ENABLED
+	event_debug_logging_mask_ = which;
+#endif
+}
+
 void
 event_set_fatal_callback(event_fatal_cb cb)
 {