add OER codec for string types
diff --git a/skeletons/file-dependencies b/skeletons/file-dependencies
index cb4b92a..eeba0ff 100644
--- a/skeletons/file-dependencies
+++ b/skeletons/file-dependencies
@@ -69,6 +69,7 @@
 
 CODEC-OER:			# THIS IS A SPECIAL SECTION
 INTEGER_oer.c
+OCTET_STRING_oer.c
 NativeInteger_oer.c
 constr_SEQUENCE_oer.c