Index: libcfa/src/concurrency/kernel/cluster.hfa
===================================================================
--- libcfa/src/concurrency/kernel/cluster.hfa	(revision 3eeeb882cd93a559b38bb056d7f65d5cef6675fc)
+++ libcfa/src/concurrency/kernel/cluster.hfa	(revision 24d6572fc571b2a894d56a9335edd57899c448c0)
@@ -40,5 +40,5 @@
 
 // convert to log2 scale but using double
-static inline __readyQ_avg_t __to_readyQ_avg(unsigned long long intsc) { if(unlikely(0 == intsc)) return 0.0; else return log2(intsc); }
+static inline __readyQ_avg_t __to_readyQ_avg(unsigned long long intsc) { if(unlikely(0 == intsc)) return 0.0; else return log2((__readyQ_avg_t)intsc); }
 
 #define warn_large_before warnf( !strict || old_avg < 35.0, "Suspiciously large previous average: %'lf, %'" PRId64 "ms \n", old_avg, program()`ms )