diff --git a/CanSpamTransmitter.c b/CanSpamTransmitter.c
index e269596..8d01374 100644
--- a/CanSpamTransmitter.c
+++ b/CanSpamTransmitter.c
@@ -217,12 +217,14 @@ static eTimeEventTransmit isEventTransmitter(tCanSpamTransmitter *env) {
         env->time_CCU_Msg3 = env->timeMs + CCU_Msg3_CYC;
 
         // Rolling Counter [0 - 15]
-        if (ccu_candb_tx.CCU_Msg3.CCU_MSG3_RC > 15) {
-            ccu_candb_tx.CCU_Msg3.CCU_MSG3_RC = 0;
+        if (env->CCU_Msg3_CCU_MSG3_RC > 15) {
+            env->CCU_Msg3_CCU_MSG3_RC = 0;
         } else {
-            ++ccu_candb_tx.CCU_Msg3.CCU_MSG3_RC;
+            ++env->CCU_Msg3_CCU_MSG3_RC;
         }
 
+        ccu_candb_tx.CCU_Msg3.CCU_MSG3_RC = env->CCU_Msg3_CCU_MSG3_RC;
+
         // Checksum XOR8 of the data field this message
         // Checksum computed as per XOR algorithm:
         // Byte 1 XOR byte 2 .... XOR byte n-1. (n = packet length.)
diff --git a/CanSpamTransmitter.h b/CanSpamTransmitter.h
index 85bb25a..22f5bcc 100644
--- a/CanSpamTransmitter.h
+++ b/CanSpamTransmitter.h
@@ -20,7 +20,7 @@
 #define CCU_VCU_Msg1_SEND 0
 #define CCU_VCU_Msg2_SEND 0
 #define CCU_Msg1_SEND 0
-#define CCU_Msg3_SEND 0
+#define CCU_Msg3_SEND 1
 #define CU_AC_Ctrl_SEND 0
 
 
@@ -62,6 +62,7 @@ typedef struct {
     uint32_t time_CCU_AC_Ctrl;
 
     uint8_t CCU_HVC_Req_Msg_CCU_HVC_Req_RC;
+    uint8_t CCU_Msg3_CCU_MSG3_RC;
 
     bool isMute;