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-rw-r--r--src/plist.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/plist.c b/src/plist.c
index 29dbfb7..6d7a07f 100644
--- a/src/plist.c
+++ b/src/plist.c
@@ -1067,6 +1067,11 @@ static void plist_set_element_val(plist_t node, plist_type type, const void *val
PLIST_API void plist_set_key_val(plist_t node, const char *val)
{
+ plist_t father = plist_get_parent(node);
+ plist_t item = plist_dict_get_item(father, val);
+ if (item) {
+ return;
+ }
plist_set_element_val(node, PLIST_KEY, val, strlen(val));
}