diff --git a/aegisub/configure.in b/aegisub/configure.in
index 43544e9e4..ba66ca8ee 100644
--- a/aegisub/configure.in
+++ b/aegisub/configure.in
@@ -490,8 +490,8 @@ WX_DEBUG=$DEBUG
 WX_UNICODE=$UNICODE
 WX_CONFIG_CHECK([wx_required_version],,,[std,gl,stc],[$WXCONFIG_FLAGS])
 
-AS_IF([test x$have_wxconfig = xno],
-  AC_MSG_FAILURE([wxWidgets detection failed, please set --with-wx* or add the libraries to your LIBS, CXX/CFLAGS.]))
+AS_IF([test x$WX_VERSION = x],
+  [AC_MSG_FAILURE([wxWidgets detection failed, please set --with-wx* or add the libraries to your LIBS, CXX/CFLAGS.])])
 
 AC_ARG_ENABLE(slow-wx-checks,
               AS_HELP_STRING([--disable-slow-wx-checks],[Disable slow-running checks for wx components.]))