diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 33ac7e6a63..87b72887a5 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -3,6 +3,9 @@ Changes
 
 0.12.4, XX/XX/XXXX
 
+* load_word2vec_format() performance (@svenkreiss, #555)
+  - remove `init_sims()` call for performance improvements when normalized vectors are not needed
+  - remove `norm_only` parameter (API change)
 * Better internal handling of job batching in word2vec (#535)
   - up to 300% speed up when training on very short documents (~tweets)
 * Word2vec allows non-strict unicode error handling (ignore or replace) (Gordon Mohr, #466)