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-rw-r--r--usr.bin/tr/str.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/usr.bin/tr/str.c b/usr.bin/tr/str.c
index daa719510f48..e81df3356455 100644
--- a/usr.bin/tr/str.c
+++ b/usr.bin/tr/str.c
@@ -145,7 +145,7 @@ bracket(s)
int isalnum __P((int)),
isalpha __P((int)),
- isblank __P((int)),
+/* isblank __P((int)), until 4.4 */
isspace __P((int)),
iscntrl __P((int)),
isdigit __P((int)),