diff --git a/tools/eclipse/BUCK b/tools/eclipse/BUCK
index 57f3afbcd9..048fdb812e 100644
--- a/tools/eclipse/BUCK
+++ b/tools/eclipse/BUCK
@@ -21,6 +21,7 @@ java_library(
     '//lib/bouncycastle:bcprov',
     '//lib/bouncycastle:bcpg',
     '//lib/bouncycastle:bcpkix',
+    '//lib/gwt:javax-validation',
     '//lib/jetty:servlets',
     '//lib/prolog:compiler_lib',
     '//Documentation:index_lib',