diff --git a/firmware/integration/rusefi_config.txt b/firmware/integration/rusefi_config.txt
index 5692c66ccd4..3aff9b9d296 100644
--- a/firmware/integration/rusefi_config.txt
+++ b/firmware/integration/rusefi_config.txt
@@ -1069,7 +1069,7 @@ bit flexCranking;Enable a second cranking table to use for E100 flex fuel, inter
 bit useIacPidMultTable;+This flag allows to use a special 'PID Multiplier' table (0.0-1.0) to compensate for nonlinear nature of IAC-RPM controller
 bit isBoostControlEnabled
 bit launchSmoothRetard;+Interpolates the Ignition Retard from 0 to 100% within the RPM Range
-bit unused1476b20
+bit isPhaseSyncRequiredForIgnition;Some engines are OK running semi-random sequential while other engine require phase synchronization
 	bit unused1476b8
 bit unused_1484_bit_24
 bit unused_1484_bit_25
diff --git a/firmware/tunerstudio/rusefi.input b/firmware/tunerstudio/rusefi.input
index 86cd06f8ef8..1b6435b62dd 100644
--- a/firmware/tunerstudio/rusefi.input
+++ b/firmware/tunerstudio/rusefi.input
@@ -1991,6 +1991,7 @@ cmd_set_engine_type_default					= "@@TS_IO_TEST_COMMAND_char@@\x00\x31\x00\x00"
 		field = "VVT offset bank 1 exhaust",			vvtOffsets2, { camInputs2 != 0 }
 		field = "VVT offset bank 2 intake",			    vvtOffsets3, { camInputs3 != 0 }
 		field = "VVT offset bank 2 exhaust",			vvtOffsets4, { camInputs4 != 0 }
+		field = "Require CAM/VVT sync for ignition",    isPhaseSyncRequiredForIgnition
 	    field = "Print verbose VVT sync details to console",verboseVVTDecoding
 	    field = "Print verbose trigger sync to console",   verboseTriggerSynchDetails
 	    field = "Do not print messages in case of sync error",  silentTriggerError