diff --git a/src/modules/module-rtkit.c b/src/modules/module-rtkit.c
index de30f4123..419e4be81 100644
--- a/src/modules/module-rtkit.c
+++ b/src/modules/module-rtkit.c
@@ -518,7 +518,7 @@ static void *custom_start(void *data)
 	struct impl *impl = this->impl;
 
 	pthread_mutex_lock(&impl->lock);
-	this->pid = gettid();
+	this->pid = _gettid();
 	pthread_cond_broadcast(&impl->cond);
 	pthread_mutex_unlock(&impl->lock);