diff --git a/src/entt/entity/sparse_set.hpp b/src/entt/entity/sparse_set.hpp
index 8a4c0e3ff..fbe4b20cc 100644
--- a/src/entt/entity/sparse_set.hpp
+++ b/src/entt/entity/sparse_set.hpp
@@ -366,7 +366,7 @@ protected:
             break;
         }
 
-        return --(end() - pos);
+        return --(end() - static_cast<typename iterator::difference_type>(pos));
     }
 
 public: