diff --git a/src/nxsas_format.cpp b/src/nxsas_format.cpp
index ebb43e7..a538604 100644
--- a/src/nxsas_format.cpp
+++ b/src/nxsas_format.cpp
@@ -6,7 +6,7 @@
 
 using namespace std;
 
-h5_group* get_nxsas_format(){
+h5_group* get_format_definition(){
 
     auto format = 
     new h5_group("entry", {