diff --git a/.gitmodules b/.gitmodules
index c32f5a1cdf..3f4c53676e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -22,7 +22,6 @@
 [submodule "firmware/controllers/can/wideband_firmware"]
 	path = firmware/controllers/can/wideband_firmware
 	url = https://github.com/mck1117/wideband
-	branch = 20210110-hotfix
 [submodule "firmware/ext/uzlib"]
 	path = firmware/ext/uzlib
 	url = https://github.com/pfalcon/uzlib
diff --git a/firmware/controllers/can/wideband_firmware b/firmware/controllers/can/wideband_firmware
index e012aabeef..88278fe7e6 160000
--- a/firmware/controllers/can/wideband_firmware
+++ b/firmware/controllers/can/wideband_firmware
@@ -1 +1 @@
-Subproject commit e012aabeef0cff9fd4f04b26511275a70d907cb0
+Subproject commit 88278fe7e6d843dd0d7248f4c8610202c2714780
diff --git a/firmware/controllers/sensors/AemXSeriesLambda.cpp b/firmware/controllers/sensors/AemXSeriesLambda.cpp
index 0a10936037..635cb98329 100644
--- a/firmware/controllers/sensors/AemXSeriesLambda.cpp
+++ b/firmware/controllers/sensors/AemXSeriesLambda.cpp
@@ -99,37 +99,14 @@ void AemXSeriesWideband::decodeAemXSeries(const CANRxFrame& frame, efitick_t now
 	setValidValue(lambdaFloat, nowNt);
 }
 
-// TODO: include rusEFI wideband file directly
-namespace wbo
-{
-struct StandardData
-{
-    uint8_t Version;
-    uint8_t Valid;
-
-    uint16_t Lambda;
-    uint16_t TemperatureC;
-
-    uint16_t pad;
-};
-
-struct DiagData
-{
-    uint16_t Esr;
-    uint16_t NernstDc;
-    uint8_t PumpDuty;
-    uint8_t Status;
-
-    uint8_t HeaterDuty;
-    uint8_t pad;
-};
-} // namespace wbo
+#include "wideband_firmware/for_rusefi/wideband_can.h"
 
 void AemXSeriesWideband::decodeRusefiStandard(const CANRxFrame& frame, efitick_t nowNt) {
 	auto data = reinterpret_cast<const wbo::StandardData*>(&frame.data8[0]);
 
-	// TODO: enforce version check
-	//bool versionValid = data->Version != RUSEFI_WIDEBAND_VERSION;
+	if (data->Version != RUSEFI_WIDEBAND_VERSION) {
+		// TODO: firmwareError here
+	}
 
 	float lambda = 0.0001f * data->Lambda;
 	engine->outputChannels.wbTemperature[m_sensorIndex] = data->TemperatureC;