diff --git a/TODO-RELEASE b/TODO-RELEASE
index 329e217b0..41453001d 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -7,4 +7,5 @@
 # If any interfaces have been added since the last public release: c:r:a + 1.
 # If any interfaces have been removed or changed since the last public release: c:r:0.
 #library	what			description / commit summary line
-gsm		API/ABI change		l1sap.h, added struct members to ph_data_param and ph_tch_param
\ No newline at end of file
+gsm		API/ABI change		l1sap.h, added struct members to ph_data_param and ph_tch_param
+sim		API/ABI change		new osim_file_desc_find_aid()
diff --git a/include/osmocom/sim/sim.h b/include/osmocom/sim/sim.h
index 8eb3f11a4..5440d8551 100644
--- a/include/osmocom/sim/sim.h
+++ b/include/osmocom/sim/sim.h
@@ -242,6 +242,9 @@ struct osim_file {
 struct osim_file_desc *
 osim_file_desc_find_name(struct osim_file_desc *parent, const char *name);
 
+struct osim_file_desc *
+osim_file_desc_find_aid(struct osim_file_desc *parent, const uint8_t *aid, uint8_t aid_len);
+
 struct osim_file_desc *
 osim_file_desc_find_fid(struct osim_file_desc *parent, uint16_t fid);
 
diff --git a/src/sim/core.c b/src/sim/core.c
index b93633c17..4360ff11a 100644
--- a/src/sim/core.c
+++ b/src/sim/core.c
@@ -186,6 +186,22 @@ osim_file_desc_find_name(struct osim_file_desc *parent, const char *name)
 	return NULL;
 }
 
+struct osim_file_desc *
+osim_file_desc_find_aid(struct osim_file_desc *parent, const uint8_t *aid, uint8_t aid_len)
+{
+	struct osim_file_desc *ofd;
+	llist_for_each_entry(ofd, &parent->child_list, list) {
+		if (ofd->type != TYPE_ADF)
+			continue;
+		if (aid_len > ofd->df_name_len)
+			continue;
+		if (!memcmp(ofd->df_name, aid, aid_len)) {
+			return ofd;
+		}
+	}
+	return NULL;
+}
+
 struct osim_file_desc *
 osim_file_desc_find_fid(struct osim_file_desc *parent, uint16_t fid)
 {