diff --git a/pkgs/development/libraries/java/classpath/default.nix b/pkgs/development/libraries/java/classpath/default.nix
index 898813be7f8..215234f9176 100644
--- a/pkgs/development/libraries/java/classpath/default.nix
+++ b/pkgs/development/libraries/java/classpath/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, javac, jvm, antlr, pkgconfig, gtk, gconf }:
+{ fetchurl, stdenv, javac, jvm, antlr, pkgconfig, gtk, gconf, ecj }:
 
 stdenv.mkDerivation rec {
   name = "classpath-0.99";
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
 
   patches = [ ./missing-casts.patch ];
 
-  buildInputs = [ javac jvm antlr pkgconfig gtk gconf ];
+  buildInputs = [ javac jvm antlr pkgconfig gtk gconf ecj ];
 
   configurePhase = ''
     # GCJ tries to compile all of Classpath during the `configure' run when