diff --git a/Changes b/Changes
index 80b9caf689..454a58f35d 100644
--- a/Changes
+++ b/Changes
@@ -1,7 +1,10 @@
 10.6.x.x (relative to 10.6.0.1)
 ========
 
+API
+---
 
+- TypeIds : Claimed range for AtomsGaffer.
 
 10.6.0.1 (relative to 10.6.0.0)
 ========
diff --git a/include/IECore/TypeIds.h b/include/IECore/TypeIds.h
index f6e0720459..f95c8a2ad4 100644
--- a/include/IECore/TypeIds.h
+++ b/include/IECore/TypeIds.h
@@ -312,6 +312,9 @@ enum TypeId
 	FirstGafferTypeId = 118000, // Used by Gaffer 1.6 and later
 	LastGafferTypeId = 127999,
 
+	FirstAtomsGafferTypeId = 128000,  // Used by AtomsGaffer
+	LastAtomsGafferTypeId = 128999,
+
 	// TypeIds dynamically allocated by registerRunTimeTyped (IECore Python)
 	FirstDynamicTypeId = 300000,
 	LastDynamicTypeId = 399999,