diff --git a/gf.cabal b/gf.cabal
index bde0bd32b..1fe930bf4 100644
--- a/gf.cabal
+++ b/gf.cabal
@@ -130,6 +130,7 @@ Library
     hs-source-dirs:      src/runtime/haskell-bind
     build-tools:         hsc2hs
     extra-libraries:     gu pgf
+    c-sources:           src/runtime/haskell-bind/utils.c
     cc-options:          -std=c99
 
 Executable gf