diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index bafe8949e93..e53775464e0 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
 
   configureFlags =
     optional stdenv.isDarwin "--disable-compile-warnings"
-    ++ optional stdenv.isSunOS "--disable-modular-tests";
+    ++ optional stdenv.isSunOS ["--disable-modular-tests" "--with-libiconv"];
 
   NIX_CFLAGS_COMPILE = optionalString stdenv.isDarwin " -lintl"
     + optionalString stdenv.isSunOS " -DBSD_COMP";