diff --git a/games/sail/externs.h b/games/sail/externs.h
index 3b158769dcc..9cc84d8fa08 100644
--- a/games/sail/externs.h
+++ b/games/sail/externs.h
@@ -302,7 +302,6 @@ double arctan();
 char *saywhat();
 struct ship *closestenemy();
 
-char *calloc();
 char *rindex();
 char *strcpy();
 char *strcat();