diff --git a/Options.hs b/Options.hs
index ab7850532..1a617174d 100644
--- a/Options.hs
+++ b/Options.hs
@@ -18,6 +18,9 @@ configflags = [
 #endif
 #ifdef ANSI
  ,"ansi"
+#endif
+#ifdef HAPPS
+ ,"happs"
 #endif
  ]
 versionmsg  = "hledger " ++ version ++ configmsg ++ "\n"