diff --git a/lib/KBoxHardware/src/board.h b/lib/KBoxHardware/src/board.h
index a7faca76..3ba3d078 100644
--- a/lib/KBoxHardware/src/board.h
+++ b/lib/KBoxHardware/src/board.h
@@ -82,7 +82,7 @@ static const pin_t nmea2_out_enable = 16;
 #define NMEA1_SERIAL Serial2
 #define NMEA2_SERIAL Serial3
 
-/* Analag Inputs */
+/* Analog Inputs */
 #ifdef BOARD_v1_revA
 static const pin_t adc1_analog = A10;
 static const pin_t adc2_analog = A11;
@@ -97,4 +97,4 @@ static const float analog_max_voltage = 3.0 / (10000/(10000+56000.0));
 static const pin_t supply_analog = A14;
 
 /* SDCard Interface */
-static const pin_t sdcard_cs = 15;
\ No newline at end of file
+static const pin_t sdcard_cs = 15;
diff --git a/src/common/signalk/SKNMEAParser.cpp b/src/common/signalk/SKNMEAParser.cpp
index 6cea5c23..18a9ffcd 100644
--- a/src/common/signalk/SKNMEAParser.cpp
+++ b/src/common/signalk/SKNMEAParser.cpp
@@ -133,10 +133,7 @@ const SKUpdate& SKNMEAParser::parseMWV(const SKSourceInput& input, NMEASentenceR
 
   // Wind sensors return a number between 0 and 360 but we want an
   // angle in radian with negative values when wind coming from port
-  if (windAngle > 180) {
-    windAngle = windAngle - 360;
-  }
-  windAngle = SKDegToRad(windAngle);
+  windAngle = SKNormalizeAngle(SKDegToRad(windAngle));
 
   SKUpdateStatic<2>* wmv = new SKUpdateStatic<2>();
   wmv->setTimestamp(time);
diff --git a/src/test/signalk/SKNMEAParserTest.cpp b/src/test/signalk/SKNMEAParserTest.cpp
index 4e141e04..63ab3da1 100644
--- a/src/test/signalk/SKNMEAParserTest.cpp
+++ b/src/test/signalk/SKNMEAParserTest.cpp
@@ -75,8 +75,8 @@ TEST_CASE("SKNMEAParser: MWV") {
     CHECK( update.getSource() != SKSourceUnknown );
     CHECK( update.getContext() == SKContextSelf );
     CHECK( update.getTimestamp().getTime() == 42 );
-    CHECK( update.getEnvironmentWindSpeedApparent() == SKKnotToMs(5.19) );
-    CHECK( update.getEnvironmentWindAngleApparent() == SKDegToRad(56) );
+    CHECK( update.getEnvironmentWindSpeedApparent() == Approx(SKKnotToMs(5.19)) );
+    CHECK( update.getEnvironmentWindAngleApparent() == Approx(SKDegToRad(56)) );
   }
   SECTION("MWV true") {
     const SKUpdate& update = p.parse(SKSourceInputNMEA0183_1, "$IIMWV,027,T,3.82,N,A*19", SKTime(42));
@@ -111,6 +111,12 @@ TEST_CASE("SKNMEAParser: MWV") {
 
     CHECK( update.getSize() == 0 );
   }
+  SECTION("MWV relative with wind angle > 180") {
+    // Unit S seems to be knots but I cannot find a real source here.
+    const SKUpdate& update = p.parse(SKSourceInputNMEA0183_1, "$WIMWV,271,R,5.6,K,A*3F", SKTime(42));
+
+    CHECK( update.getEnvironmentWindAngleApparent() == Approx(SKDegToRad(-89)) );
+  }
 }
 
 TEST_CASE("SKNMEAParser: XDR wind temperature") {