diff --git a/tools/eclipse/project.py b/tools/eclipse/project.py
index 2cba4fbdc9..af36a3f7d6 100755
--- a/tools/eclipse/project.py
+++ b/tools/eclipse/project.py
@@ -155,6 +155,7 @@ def gen_classpath(ext):
       # Exceptions: both source and lib
       if p.endswith('libquery_parser.jar') or \
          p.endswith('prolog/libcommon.jar') or \
+         p.endswith('com_google_protobuf/libprotobuf_java.jar') or \
          p.endswith('lucene-core-and-backward-codecs__merged.jar'):
         lib.add(p)
       # JGit dependency from external repository