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-rw-r--r--lib-src/sorted-doc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib-src/sorted-doc.c b/lib-src/sorted-doc.c
index db3f3029532..4fe830e4013 100644
--- a/lib-src/sorted-doc.c
+++ b/lib-src/sorted-doc.c
@@ -93,7 +93,7 @@ xmalloc (int size)
}
char *
-xstrdup (char *str)
+xstrdup (const char *str)
{
char *buf = xmalloc (strlen (str) + 1);
(void) strcpy (buf, str);