diff --git a/v51_l1_fsm.c b/src/v5x_l1_fsm.c
similarity index 86%
rename from v51_l1_fsm.c
rename to src/v5x_l1_fsm.c
index bb4172c..08c8e68 100644
--- a/v51_l1_fsm.c
+++ b/src/v5x_l1_fsm.c
@@ -25,11 +25,11 @@
 
 #include "v5x_internal.h"
 
-enum v51_l1_fsm_state {
-	V51_L1FSM_S_LE1_NORMAL,
-	V51_L1FSM_S_LE2_LOCALLY_DET_FAIL,
-	V51_L1FSM_S_LE3_REMOTELY_DET_FAIL,
-	V51_L1FSM_S_LE4_INTERNAL_FAIL,
+enum v5x_l1_fsm_state {
+	V5X_L1FSM_S_LE1_NORMAL,
+	V5X_L1FSM_S_LE2_LOCALLY_DET_FAIL,
+	V5X_L1FSM_S_LE3_REMOTELY_DET_FAIL,
+	V5X_L1FSM_S_LE4_INTERNAL_FAIL,
 };
 
 /* TODO */