diff --git a/Makefile b/Makefile
index 22f4242fde5060f1dd7916e7ee6766aeb9a63fcf..34e73c019360e4f2a9414d0591afb4248a89fa5c 100644
--- a/Makefile
+++ b/Makefile
@@ -27,7 +27,7 @@ D       = $(simcdir)/fdss/
 OBJ1	= target.o brem.o gauss1.o NtupleInit.o NtupleClose.o enerloss_new.o
 OBJ2	= radc.o init.o dbase.o physics_kaon.o physics_pion.o physics_delta.o physics_proton.o loren.o sf_lookup.o
 OBJ3    = semi_physics.o rho_physics.o rho_decay.o generate_rho.o trg_track.o semi_dilution.o
-OBJ4	= results_write.o event.o call_ranlux.o jacobians.o F1F2IN21.o
+OBJ4	= results_write.o event.o call_ranlux.o jacobians.o F1F2IN21_v1.0.o
 OBJ5	= $(A)musc.o $(A)musc_ext.o $(A)project.o $(A)transp.o
 OBJ6	= $(A)rotate_haxis.o $(A)rotate_vaxis.o $(A)locforunt.o
 OBJ7	= $(H)mc_hms.o $(H)mc_hms_hut.o $(H)mc_hms_recon.o