diff --git a/code/nel/include/nel/misc/types_nl.h b/code/nel/include/nel/misc/types_nl.h
index 3e087e5a0..a460f68dc 100644
--- a/code/nel/include/nel/misc/types_nl.h
+++ b/code/nel/include/nel/misc/types_nl.h
@@ -42,7 +42,7 @@
 
 // Operating systems definition
 
-#ifdef WIN32
+#ifdef _WIN32
 #	define NL_OS_WINDOWS
 #	define NL_LITTLE_ENDIAN
 #	define NL_CPU_INTEL