diff --git a/weboob/core/repositories.py b/weboob/core/repositories.py
index 965344d402c26e6a87b4c900ff3e4772212e75bc..8892a7dd948622e3c7aeefeed05024267e127756 100644
--- a/weboob/core/repositories.py
+++ b/weboob/core/repositories.py
@@ -270,7 +270,7 @@ def build_index(self, path, filename):
             else:
                 m = ModuleInfo(module.name)
                 m.version = self.get_tree_mtime(module_path)
-                m.capabilities = [c.__name__ for c in module.iter_caps()]
+                m.capabilities = list(set([c.__name__ for c in module.iter_caps()]))
                 m.description = module.description
                 m.maintainer = module.maintainer
                 m.license = module.license