diff --git a/docs/libcurl/symbols-in-versions b/docs/libcurl/symbols-in-versions
index a02ead453..9b01ffb05 100644
--- a/docs/libcurl/symbols-in-versions
+++ b/docs/libcurl/symbols-in-versions
@@ -374,7 +374,7 @@ CURLOPT_SSL_VERIFYPEER          7.4.2
 CURLOPT_STDERR                  7.1
 CURLOPT_TCP_NODELAY             7.11.2
 CURLOPT_TELNETOPTIONS           7.7
-CURLOPT_TFTPBLKSIZE             7.19.4
+CURLOPT_TFTP_BLKSIZE            7.19.4
 CURLOPT_TIMECONDITION           7.1
 CURLOPT_TIMEOUT                 7.1
 CURLOPT_TIMEOUT_MS              7.16.2