diff --git a/slsDetectorSoftware/commonFiles/sls_detector_funcs.h b/slsDetectorSoftware/commonFiles/sls_detector_funcs.h
index 776a9712b..6d43e33c9 100644
--- a/slsDetectorSoftware/commonFiles/sls_detector_funcs.h
+++ b/slsDetectorSoftware/commonFiles/sls_detector_funcs.h
@@ -124,6 +124,8 @@ enum {
 
   F_LOCK_RECEIVER,			/**< locks receiver */
 
+  F_GET_FRAME_INDEX				/**< gets the frame index */
+
   /* Always append functions hereafter!!! */
 
 };