diff --git a/pkgs/applications/graphics/ImageMagick/default.nix b/pkgs/applications/graphics/ImageMagick/default.nix
index b97eb5a6580..47f60ed7ec1 100644
--- a/pkgs/applications/graphics/ImageMagick/default.nix
+++ b/pkgs/applications/graphics/ImageMagick/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     ];
 
   propagatedBuildInputs =
-    [ bzip2 freetype libjpeg libX11 libXext libXt lcms2 ];
+    [ bzip2 freetype libjpeg libX11 libXext libXt lcms2 libwebp ];
 
   postInstall = ''
 
diff --git a/pkgs/tools/graphics/zbar/default.nix b/pkgs/tools/graphics/zbar/default.nix
index e16d1c888c4..48e3316a4a2 100644
--- a/pkgs/tools/graphics/zbar/default.nix
+++ b/pkgs/tools/graphics/zbar/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, imagemagickBig, pkgconfig, python, pygtk, perl
-, libX11, libv4l, qt4, lzma, gtk2, libwebp
+, libX11, libv4l, qt4, lzma, gtk2
 }:
 
 stdenv.mkDerivation rec {
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   buildInputs =
     [ imagemagickBig pkgconfig python pygtk perl libX11
-      libv4l qt4 lzma gtk2 libwebp ];
+      libv4l qt4 lzma gtk2 ];
 
   configureFlags = ["--disable-video"];