diff --git a/configure.ac b/configure.ac
index e45f11db45..df1b36e296 100644
--- a/configure.ac
+++ b/configure.ac
@@ -479,9 +479,11 @@ have_inotify="${ac_cv_header_sys_inotify_h}"
 AM_CONDITIONAL([HAVE_INOTIFY], [test "x${have_inotify}" = "xyes"])
 
 have_notify_win32="${have_win32}"
-AC_DEFINE_IF([HAVE_NOTIFY_WIN32],
-   [test "x${have_notify_win32}" = "xyes"],
-   [File monitoring with Windows notification])
+if test "x${have_notify_win32}" = "xyes" ; then
+  AC_DEFINE([HAVE_NOTIFY_WIN32], [1], [File monitoring with Windows notification])
+else
+  AC_DEFINE([HAVE_NOTIFY_WIN32], [], [File monitoring with Windows notification])
+fi
 AM_CONDITIONAL([HAVE_NOTIFY_WIN32], [test "x${have_notify_win32}" = "xyes"])