diff --git a/bacnet-stack/demo/object/bacfile.h b/bacnet-stack/demo/object/bacfile.h
index 585b9ca9..530395cc 100644
--- a/bacnet-stack/demo/object/bacfile.h
+++ b/bacnet-stack/demo/object/bacfile.h
@@ -55,14 +55,12 @@ extern "C" {
     uint32_t bacfile_count(void);
     uint32_t bacfile_index_to_instance(unsigned find_index);
     uint32_t bacfile_instance(char *filename);
-#if TSM_ENABLED
     /* this is one way to match up the invoke ID with */
     /* the file ID from the AtomicReadFile request. */
     /* Another way would be to store the */
     /* invokeID and file instance in a list or table */
     /* when the request was sent */
     uint32_t bacfile_instance_from_tsm(uint8_t invokeID);
-#endif
 
     /* handler ACK helper */
     bool bacfile_read_data(BACNET_ATOMIC_READ_FILE_DATA * data);