diff --git a/CI/CI.ml b/CI/CI.ml
index 5e45724..e85c133 100644
--- a/CI/CI.ml
+++ b/CI/CI.ml
@@ -91,7 +91,7 @@ let create_matrix_spin f det_space =
     (** Update function when ki and kj are connected *)
     let update i j ki kj =
       let x = f ki kj in
-      if abs_float x < Constants.epsilon then
+      if abs_float x > Constants.epsilon then
         result.(i) <- (j, x) :: result.(i) ;
     in