diff -r 59be65b7cdfd -r 9ce563fb2989 mercurial/cext/revlog.c
--- a/mercurial/cext/revlog.c	Mon Mar 14 14:10:41 2022 +0000
+++ b/mercurial/cext/revlog.c	Mon Mar 14 17:57:03 2022 +0100
@@ -179,7 +179,7 @@
 /* next free offset: 73 */
 
 static const char comp_mode_inline = 2;
-static const char rank_unknown = -1;
+static const int rank_unknown = -1;
 
 static void raise_revlog_error(void)
 {