diff --git a/docs/libcurl/curl_multi_perform.3 b/docs/libcurl/curl_multi_perform.3
index 64733ffb52..6a0ccb938b 100644
--- a/docs/libcurl/curl_multi_perform.3
+++ b/docs/libcurl/curl_multi_perform.3
@@ -103,7 +103,7 @@ default:
 .SH "RETURN VALUE"
 CURLMcode type, general libcurl multi interface error code.
 
-Before version 7.20.0: If you receive \fICURLM_CALL_MULTI_PERFORM\fP, this
+Before version 7.20.0 (released on February 9 2010): If you receive \fICURLM_CALL_MULTI_PERFORM\fP, this
 basically means that you should call \fIcurl_multi_perform(3)\fP again, before
 you select() on more actions. You don't have to do it immediately, but the
 return code means that libcurl may have more data available to return or that
diff --git a/docs/libcurl/libcurl-errors.3 b/docs/libcurl/libcurl-errors.3
index 6f7d87d733..c76535d0ff 100644
--- a/docs/libcurl/libcurl-errors.3
+++ b/docs/libcurl/libcurl-errors.3
@@ -271,7 +271,7 @@ interface. Also consider \fIcurl_multi_strerror(3)\fP.
 .IP "CURLM_CALL_MULTI_PERFORM (-1)"
 This is not really an error. It means you should call
 \fIcurl_multi_perform(3)\fP again without doing select() or similar in
-between. Before version 7.20.0 this could be returned by
+between. Before version 7.20.0 (released on February 9 2010) this could be returned by
 \fIcurl_multi_perform(3)\fP, but in later versions this return code is never
 used.
 .IP "CURLM_CALL_MULTI_SOCKET (-1)"