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-rw-r--r--wsutil/str_util.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/wsutil/str_util.c b/wsutil/str_util.c
index 2bd7041fb6..42934597e3 100644
--- a/wsutil/str_util.c
+++ b/wsutil/str_util.c
@@ -55,7 +55,7 @@ ascii_strup_inplace(gchar *str)
/* Check if an entire string is printable. */
gboolean
-isprint_string(guchar *str)
+isprint_string(const guchar *str)
{
guint pos;