diff --git a/include/wx/chkconf.h b/include/wx/chkconf.h
index b6db50e9f5..fbccbd0be4 100644
--- a/include/wx/chkconf.h
+++ b/include/wx/chkconf.h
@@ -1265,7 +1265,7 @@
 #if wxUSE_DATEPICKCTRL
 #   if !wxUSE_DATETIME
 #       ifdef wxABORT_ON_CONFIG_ERROR
-#           error wxDatePickerCtrl requires wxUSE_DATETIME"
+#           error "wxDatePickerCtrl requires wxUSE_DATETIME"
 #       else
 #           undef wxUSE_DATETIME
 #           define wxUSE_DATETIME 1