Index: /trunk/Mars/mcore/zofits.h
===================================================================
--- /trunk/Mars/mcore/zofits.h	(revision 17751)
+++ /trunk/Mars/mcore/zofits.h	(revision 17752)
@@ -80,5 +80,5 @@
 public:
         /// static setter for the default number of threads to use. -1 means all available physical cores
-        static uint32_t DefaultNumThreads(const uint32_t &_n=-2) { static uint32_t n=0; if (int32_t(_n)<-1) n=_n; return n; }
+        static uint32_t DefaultNumThreads(const uint32_t &_n=-2) { static uint32_t n=0; if (int32_t(_n)>=-1) n=_n; return n; }
         static uint32_t DefaultMaxMemory(const uint32_t &_n=0) { static uint32_t n=1000000; if (_n>0) n=_n; return n; }
         static uint32_t DefaultMaxNumTiles(const uint32_t &_n=0) { static uint32_t n=1000; if (_n>0) n=_n; return n; }