diff --git a/pkgs/desktops/kde-4.7/kdepimlibs.nix b/pkgs/desktops/kde-4.7/kdepimlibs.nix
index 736508eaf0f..1c4ccec8423 100644
--- a/pkgs/desktops/kde-4.7/kdepimlibs.nix
+++ b/pkgs/desktops/kde-4.7/kdepimlibs.nix
@@ -8,6 +8,12 @@ kde {
     ];
 
   propagatedBuildInputs = [ kdelibs ];
+  
+  preConfigure = ''
+    echo '#include <sys/types.h>' > tmp.h
+    cat tmp.h kioslave/smtp/command.h > tmp2.h
+    mv tmp2.h kioslave/smtp/command.h
+  '';
 
   meta = {
     description = "KDE PIM libraries";