Index: src/threading_pthread.m
==================================================================
--- src/threading_pthread.m
+++ src/threading_pthread.m
@@ -113,11 +113,11 @@
 				return false;
 #endif
 
 			if (attr->priority < 0) {
 				param.sched_priority = minPrio +
-				    (1.0 + attr->priority) *
+				    (1.0f + attr->priority) *
 				    (normalPrio - minPrio);
 			} else
 				param.sched_priority = normalPrio +
 				    attr->priority * (maxPrio - normalPrio);