1 files changed, 4 insertions, 0 deletions
diff --git a/orc-test/orctest.c b/orc-test/orctest.c
index 944959d..4be250c 100644
--- a/orc-test/orctest.c
+++ b/orc-test/orctest.c
@@ -13,6 +13,10 @@
 #include <string.h>
 #include <math.h>
 
+#ifdef _MSC_VER
+#define isnan(x) _isnan(x)
+#endif
+
 void _orc_profile_init(void);
 
 OrcRandomContext rand_context;