diff --git a/intern/cycles/kernel/osl/osl_globals.h b/intern/cycles/kernel/osl/osl_globals.h
index 80ced9dfd62..003e39ca3c3 100644
--- a/intern/cycles/kernel/osl/osl_globals.h
+++ b/intern/cycles/kernel/osl/osl_globals.h
@@ -22,12 +22,17 @@
 #ifdef WITH_OSL
 
 #include <OSL/oslexec.h>
+#include <cmath>
 
 #include "util_map.h"
 #include "util_param.h"
 #include "util_thread.h"
 #include "util_vector.h"
 
+#ifndef WIN32
+using std::isfinite;
+#endif
+
 CCL_NAMESPACE_BEGIN
 
 class OSLRenderServices;