diff --git a/subprojects/bahaghari/lib/trivial.nix b/subprojects/bahaghari/lib/trivial.nix
index 291c2e64..64a3a683 100644
--- a/subprojects/bahaghari/lib/trivial.nix
+++ b/subprojects/bahaghari/lib/trivial.nix
@@ -39,8 +39,8 @@
   */
   toBaseDigitsWithGlyphs = base: i: glyphs:
     let
-      baseDigits = pkgs.lib.toBaseDigits i;
-      toBaseDigits = d: glyphs.${builtins.toString i};
+      baseDigits = pkgs.lib.toBaseDigits base i;
+      toBaseDigits = d: glyphs.${builtins.toString d};
     in
     pkgs.lib.concatMapStrings toBaseDigits baseDigits;
 }