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-rw-r--r--stringlib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/stringlib.c b/stringlib.c
index 09866d5..0a612ca 100644
--- a/stringlib.c
+++ b/stringlib.c
@@ -125,7 +125,7 @@ find_index_in_alist (string, alist, flags)
not including END. */
char *
substring (string, start, end)
- char *string;
+ const char *string;
int start, end;
{
register int len;