diff --git a/pkgs/desktops/kde-4.2/default.nix b/pkgs/desktops/kde-4.2/default.nix
index f8f310007d0f..133f366c6f0c 100644
--- a/pkgs/desktops/kde-4.2/default.nix
+++ b/pkgs/desktops/kde-4.2/default.nix
@@ -166,7 +166,7 @@ rec {
   };
   
   kdesdk = import ./sdk {
-    inherit (pkgs) stdenv fetchurl cmake qt4 perl libxml2 libxslt boost subversion;
+    inherit (pkgs) stdenv fetchurl cmake qt4 perl libxml2 libxslt boost subversion apr;
     inherit kdelibs kdepimlibs;
     inherit automoc4 phonon strigi;
   };
diff --git a/pkgs/desktops/kde-4.2/sdk/default.nix b/pkgs/desktops/kde-4.2/sdk/default.nix
index e35254dc8ee5..51524eccd6d5 100644
--- a/pkgs/desktops/kde-4.2/sdk/default.nix
+++ b/pkgs/desktops/kde-4.2/sdk/default.nix
@@ -1,4 +1,4 @@
-{stdenv, fetchurl, cmake, qt4, perl, libxml2, libxslt, boost, subversion,
+{stdenv, fetchurl, cmake, qt4, perl, libxml2, libxslt, boost, subversion, apr,
  kdelibs, kdepimlibs, automoc4, phonon, strigi}:
 
 stdenv.mkDerivation {
@@ -8,6 +8,6 @@ stdenv.mkDerivation {
     sha1 = "dca74527bcf6e5925ec58a74196e683cc68a259a";
   };
   CMAKE_PREFIX_PATH=kdepimlibs;
-  buildInputs = [ cmake qt4 perl libxml2 libxslt boost subversion
+  buildInputs = [ cmake qt4 perl libxml2 libxslt boost subversion apr
                   kdelibs kdepimlibs automoc4 phonon strigi ];
 }