--- a/mercurial/cext/revlog.c	Mon Mar 14 12:24:34 2022 -0700
+++ b/mercurial/cext/revlog.c	Tue Mar 15 09:26:26 2022 +0100
@@ -168,7 +168,7 @@
 /* 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)
 {