diff --git a/simgear/compiler.h b/simgear/compiler.h
index 795747d5..4e2bea29 100644
--- a/simgear/compiler.h
+++ b/simgear/compiler.h
@@ -63,7 +63,7 @@
 #ifdef _MSC_VER
 #  define bcopy(from, to, n) memcpy(to, from, n)
 
-#  if _MSC_VER >= 1200  // msvc++ 6.0 or greater
+#  if _MSC_VER >= 1200  && _MSC_VER < 1800 // msvc++ 6.0 up to MSVC2013
 #    define isnan _isnan
 #    define snprintf _snprintf
 #    if _MSC_VER < 1500