diff --git a/cornac/models/companion/recom_companion.pyx b/cornac/models/companion/recom_companion.pyx
index 1678a8b1..7b82de76 100644
--- a/cornac/models/companion/recom_companion.pyx
+++ b/cornac/models/companion/recom_companion.pyx
@@ -855,7 +855,7 @@ class Companion(Recommender):
                 s = 1
                 if user_item_aspect_neg_opinion_dict.my_map.find(get_key3(get_key(u_idx, i_idx), a_idx, o_jdx)) != user_item_aspect_neg_opinion_dict.my_map.end():
                     i_score = YN[idx]
-                    j_score = user_item_aspect_pos_opinion_dict.my_map[get_key3(get_key(u_idx, i_idx), a_idx, o_jdx)]
+                    j_score = user_item_aspect_neg_opinion_dict.my_map[get_key3(get_key(u_idx, i_idx), a_idx, o_jdx)]
                     if i_score == j_score:
                         skipped_uiaon += 1
                         continue
@@ -879,10 +879,10 @@ class Companion(Recommender):
                     for j in range(n_aspect_factors):
                         for i in range(n_user_factors):
                             del_g3[i, j, k] -= del_bpr_uiaon * U[u_idx, i] * A[a_idx, j] * uiaon_ij
-                            del_u[u_idx, i] -= del_bpr_uiaon * G2[i, j, k] * A[a_idx, j] * uiaon_ij
-                            del_a[a_idx, j] -= del_bpr_uiaon * G2[i, j, k] * U[u_idx, i] * uiaon_ij
-                            del_o[o_idx, k] -= del_bpr_uiaon * G2[i, j, k] * U[u_idx, i] * A[a_idx, j]
-                            del_o[o_jdx, k] += del_bpr_uiaon * G2[i, j, k] * U[u_idx, i] * A[a_idx, j]
+                            del_u[u_idx, i] -= del_bpr_uiaon * G3[i, j, k] * A[a_idx, j] * uiaon_ij
+                            del_a[a_idx, j] -= del_bpr_uiaon * G3[i, j, k] * U[u_idx, i] * uiaon_ij
+                            del_o[o_idx, k] -= del_bpr_uiaon * G3[i, j, k] * U[u_idx, i] * A[a_idx, j]
+                            del_o[o_jdx, k] += del_bpr_uiaon * G3[i, j, k] * U[u_idx, i] * A[a_idx, j]
                         for i in range(n_item_factors):
                             del_g3[n_user_factors + i, j, k] -= del_bpr_uiaon * I[i_idx, i] * A[a_idx, j] * uiaon_ij
                             del_i[i_idx, i] -= del_bpr_uiaon * G3[n_user_factors + i, j, k] * A[a_idx, j] * uiaon_ij