diff --git a/src/wf_handler.c b/src/wf_handler.c
--- a/src/wf_handler.c
+++ b/src/wf_handler.c
@@ -801,8 +801,8 @@ void build_snapshot_from_ring( ring_node
     unsigned long long int deltaT_F2;
 
     deltaT_F0 = DELTAT_F0;
-    deltaT_F1 = DELTAF_F1;
-    deltaT_F2 = DELTAF_F2;
+    deltaT_F1 = DELTAT_F1;
+    deltaT_F2 = DELTAT_F2;
     sampleOffset_asLong = INIT_CHAR;
 
     // (1) get the f0 acquisition time => the value is passed in argument