diff --git a/aes/ta/aes_ta.c b/aes/ta/aes_ta.c
index b259a01..21ef2f3 100644
--- a/aes/ta/aes_ta.c
+++ b/aes/ta/aes_ta.c
@@ -194,6 +194,7 @@
 	TEE_InitRefAttribute(&attr, TEE_ATTR_SECRET_VALUE, key, sess->key_size);
 
 	res = TEE_PopulateTransientObject(sess->key_handle, &attr, 1);
+	TEE_Free(key);
 	if (res != TEE_SUCCESS) {
 		EMSG("TEE_PopulateTransientObject failed, %x", res);
 		goto err;