diff --git a/pkgs/development/libraries/classads/default.nix b/pkgs/development/libraries/classads/default.nix
index 6d47ae3e7b1f..909e8ba7bf26 100644
--- a/pkgs/development/libraries/classads/default.nix
+++ b/pkgs/development/libraries/classads/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl }:
+{ stdenv, fetchurl, pcre }:
 
 let version = "1.0.10"; in
 
@@ -10,6 +10,8 @@ stdenv.mkDerivation {
     sha256 = "1czgj53gnfkq3ncwlsrwnr4y91wgz35sbicgkp4npfrajqizxqnd";
   };
 
+  buildInputs = [ pcre ];
+
   configureFlags = ''                                                  
     --enable-namespace --enable-flexible-member
   '';