diff --git a/configure.ac b/configure.ac
index 35eec48..ced1978 100644
--- a/configure.ac
+++ b/configure.ac
@@ -335,7 +335,7 @@ AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_POWERVR_X11, [test "x$SUPPORT_EGL_PLATFORM_P
 AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_POWERVR_NULL, [test "x$SUPPORT_EGL_PLATFORM_POWERVR_NULL" = "x1"])
 AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_FRUITY, [test "x$CLUTTER_WINSYS" = "xfruity"])
 AM_CONDITIONAL(SUPPORT_OSX, [test "x$CLUTTER_WINSYS" = "xosx"])
-AM_CONDITIONAL(SUPPORT_WIN32, [test "x$CLUTTER_WINSYS" = "xwin32"])
+AM_CONDITIONAL(WINSYS_WIN32, [test "x$CLUTTER_WINSYS" = "xwin32"])
 
 dnl === COGL driver backend =====================================================