diff --git a/contrib/tsearch2/ispell/regis.c b/contrib/tsearch2/ispell/regis.c
index 904521e5078..8737bd4ccc7 100644
--- a/contrib/tsearch2/ispell/regis.c
+++ b/contrib/tsearch2/ispell/regis.c
@@ -181,7 +181,7 @@ RS_execute(Regis * r, char *str)
 	}
 
 	if (len < r->nchar)
-		return 0;
+		return false;
 
 	c = str;
 	if (r->issuffix)