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-rw-r--r--src/common/tree.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/common/tree.c b/src/common/tree.c
index 33fe1d41..715b0e56 100644
--- a/src/common/tree.c
+++ b/src/common/tree.c
@@ -142,7 +142,7 @@ mybsearch (const void *key, void **array, size_t nmemb,
 }
 
 void *
-tree_find (tree *t, void *key, tree_cmp_func *cmp, void *data, int *pos)
+tree_find (tree *t, const void *key, tree_cmp_func *cmp, void *data, int *pos)
 {
 	if (!t || !t->array)
 		return NULL;