diff --git a/taiga/base/filters.py b/taiga/base/filters.py
index e26e7911..d9369cbd 100644
--- a/taiga/base/filters.py
+++ b/taiga/base/filters.py
@@ -268,7 +268,7 @@ class MembersFilterBackend(PermissionBasedFilterBackend):
 
             qs = qs.filter(memberships__project__anon_permissions__contains=[self.permission])
 
-        return qs
+        return qs.distinct()
 
 
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