diff --git a/README.md b/README.md
index 0d3c769055eaeaebe0f753fbcc135f9a10c5f9d8..cae1f59dfc2570659bb2e78fd26f176c08e8d8f6 100644
--- a/README.md
+++ b/README.md
@@ -114,7 +114,7 @@ Read Permissions:
     BodyMassIndex        HKQuantityTypeIdentifierBodyMassIndex
     LeanBodyMass         HKQuantityTypeIdentifierLeanBodyMass
     Steps                HKQuantityTypeIdentifierStepCount
-    Sex                  HKCharacteristicTypeIdentifierBiologicalSex
+    BiologicalSex        HKCharacteristicTypeIdentifierBiologicalSex
     DateOfBirth          HKCharacteristicTypeIdentifierDateOfBirth
     DietaryEnergy        HKQuantityTypeIdentifierDietaryEnergyConsumed
     ActiveEnergy         HKQuantityTypeIdentifierActiveEnergyBurned