diff --git a/data/planetiler/LightCharacteristics.java b/data/planetiler/LightCharacteristics.java
index bf610ad..51b8f59 100644
--- a/data/planetiler/LightCharacteristics.java
+++ b/data/planetiler/LightCharacteristics.java
@@ -28,7 +28,7 @@ private static String capitalize(String str) {
       Map.entry("amber", "Am"), // should be A?
       Map.entry("grey", "Gy"), //
       Map.entry("brown", "Br"), //
-      Map.entry("mangeta", "M"), //
+      Map.entry("magenta", "M"), //
       Map.entry("pink", "P") //
   );
 
diff --git a/data/planetiler/LightCharacteristicsTest.java b/data/planetiler/LightCharacteristicsTest.java
index 1a4bccc..cc1ed65 100644
--- a/data/planetiler/LightCharacteristicsTest.java
+++ b/data/planetiler/LightCharacteristicsTest.java
@@ -17,6 +17,12 @@ void singleColourTag() {
     assertEquals("R", LightCharacteristics.encodeComplexLx(tags));
   }
 
+  @Test
+  void magentaColourTag() {
+    Map<String, Object> tags = Map.of("seamark:light:1:colour", "magenta");
+    assertEquals("M", LightCharacteristics.encodeComplexLx(tags));
+  }
+
   @Test
   void fogSignal_cat() {
     Map<String, Object> tags = Map.of("seamark:fog_signal:category", "bell");