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-rw-r--r--tr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tr.c b/tr.c
index 32a4f29..ce15cfd 100644
--- a/tr.c
+++ b/tr.c
@@ -93,7 +93,7 @@ static void map(register unsigned char *string1, unsigned int string1_len,
}
}
-static unsigned int expand(char *arg, register unsigned char *buffer)
+static unsigned int expand(const char *arg, register unsigned char *buffer)
{
unsigned char *buffer_start = buffer;
int i, ac;