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-rw-r--r--src/cmd/tbl/t5.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cmd/tbl/t5.c b/src/cmd/tbl/t5.c
index 8b7a65d8..3b12d98f 100644
--- a/src/cmd/tbl/t5.c
+++ b/src/cmd/tbl/t5.c
@@ -23,7 +23,7 @@ gettbl(void)
break;
}
fullbot[nlin] = 0;
- if (cstore[0] == '.' && !isdigit(cstore[1])) {
+ if (cstore[0] == '.' && !isdigit((uchar)cstore[1])) {
instead[nlin] = cstore;
while (*cstore++)
;