diff --git a/src/file.h b/src/file.h
index a67e8ff..9115c5b 100644
--- a/src/file.h
+++ b/src/file.h
@@ -82,7 +82,7 @@
 #include <tre/regex.h>
 #include <time.h>
 #include <sys/types.h>
-#ifndef WIN32
+#ifndef _WIN32
 #include <sys/param.h>
 #endif
 /* Do this here and now, because struct stat gets re-defined on solaris */
@@ -99,7 +99,7 @@
 #define MAGIC "/etc/magic"
 #endif
 
-#if defined(__EMX__) || defined (WIN32)
+#if defined(__EMX__) || defined (_WIN32)
 #define PATHSEP	';'
 #else
 #define PATHSEP	':'
@@ -108,7 +108,7 @@
 #define file_private static
 
 #if HAVE_VISIBILITY
-# if defined(WIN32)
+# if defined(_WIN32)
 #  define file_public  __declspec(dllexport)
 #  ifndef file_protected
 #   define file_protected