1 files changed, 1 insertions, 1 deletions

diff --git a/wfileIO3.c b/wfileIO3.c
index 9cbe25e..596eb4b 100644
--- a/wfileIO3.c
+++ b/wfileIO3.c
@@ -4,7 +4,7 @@
 	At:			University of Nijmegen
 */
 
-#ifdef __WIN64
+#ifdef _WIN64
 # define A64
 #endif