diff --git a/pkgs/development/libraries/pcre/default.nix b/pkgs/development/libraries/pcre/default.nix
index 8bce1512d138..91af6f4dadf3 100644
--- a/pkgs/development/libraries/pcre/default.nix
+++ b/pkgs/development/libraries/pcre/default.nix
@@ -1,6 +1,5 @@
 { stdenv, fetchurl
 , windows ? null, variant ? null, pcre
-, withCharSize ? 8
 }:
 
 with stdenv.lib;