diff --git a/pkgs/servers/dict/default.nix b/pkgs/servers/dict/default.nix
index ea7cb80b8fc0..a85b6f8b88c5 100644
--- a/pkgs/servers/dict/default.nix
+++ b/pkgs/servers/dict/default.nix
@@ -23,6 +23,10 @@ stdenv.mkDerivation rec {
     "--sysconfdir=/etc"
   ];
 
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.cc.isClang [
+    "-Wno-error=implicit-function-declaration"
+  ]);
+
   postInstall = ''
     install -Dm444 -t $out/share/doc/${pname} NEWS README
   '';