diff --git a/src/dereko2vec.c b/src/dereko2vec.c
index 33b8d03..0e2e230 100644
--- a/src/dereko2vec.c
+++ b/src/dereko2vec.c
@@ -1510,6 +1510,43 @@
 									capParam(syn1neg_window,
 											c + l2 + window_offset);
 						}
+						if (d == 0) {
+							for (int m=0; m < metadata_index; m++) {
+								f = 0;
+								int meta_word = metadata[m];
+								if (meta_word == -1)
+									continue;
+								int meta_l1 = meta_word * layer1_size;
+								for (c = 0; c < layer1_size; c++)
+									f +=
+										syn0[c + meta_l1]
+										* syn1neg_window[c + l2
+										                 + window_offset];
+								if (f > MAX_EXP)
+									g = (label - 1) * alpha;
+								else if (f < -MAX_EXP)
+									g = (label - 0) * alpha;
+								else
+									g =
+										(label
+										 - expTable[(int) ((f + MAX_EXP)
+										                   * (EXP_TABLE_SIZE
+										                      / MAX_EXP / 2))])
+										* alpha;
+								for (c = 0; c < layer1_size; c++)
+									neu1e[c] +=
+										g
+										* syn1neg_window[c + l2
+										                 + window_offset];
+								for (c = 0; c < layer1_size; c++)
+									syn1neg_window[c + l2 + window_offset] += g
+									                                          * syn0[c + l1];
+								if (cap == 1)
+									for (c = 0; c < layer1_size; c++)
+										capParam(syn1neg_window,
+										         c + l2 + window_offset);
+							}
+						}
 					// Noise Constrastive Estimation
 					if (nce > 0)
 						for (d = 0; d < nce + 1; d++) {