diff --git a/miniaudio.h b/miniaudio.h
index 78e58d82..8addfdec 100644
--- a/miniaudio.h
+++ b/miniaudio.h
@@ -17616,7 +17616,7 @@ static ma_result ma_thread_create__posix(ma_thread* pThread, ma_thread_priority
             int priorityStep = (priorityMax - priorityMin) / 7;  /* 7 = number of priorities supported by miniaudio. */
 
             struct sched_param sched;
-            if (pthread_attr_getschedparam(&attr, &sched) == 0) {
+            if (priorityMin != -1 && priorityMax != -1 && pthread_attr_getschedparam(&attr, &sched) == 0) {
                 if (priority == ma_thread_priority_idle) {
                     sched.sched_priority = priorityMin;
                 } else if (priority == ma_thread_priority_realtime) {