diff --git a/idl/Collector.json5 b/idl/Collector.json5
index 97ca2ce..d49e6ad 100644
--- a/idl/Collector.json5
+++ b/idl/Collector.json5
@@ -5,7 +5,7 @@
     output_impl_subdir: "gc",
     includes: [
         "<xo/alloc2/Allocator.hpp>",
-        "<xo/alloc2/generation.hpp>",
+        "<xo/alloc2/Generation.hpp>",
         "<xo/alloc2/role.hpp>",
 //        "<cstdint>",
 //        "<cstddef>",
diff --git a/include/xo/alloc2/generation.hpp b/include/xo/alloc2/Generation.hpp
similarity index 100%
rename from include/xo/alloc2/generation.hpp
rename to include/xo/alloc2/Generation.hpp
diff --git a/include/xo/alloc2/gc/ACollector.hpp b/include/xo/alloc2/gc/ACollector.hpp
index 9fc4a58..93a4152 100644
--- a/include/xo/alloc2/gc/ACollector.hpp
+++ b/include/xo/alloc2/gc/ACollector.hpp
@@ -15,7 +15,7 @@
 
 // includes (via {facet_includes})
 #include <xo/alloc2/Allocator.hpp>
-#include <xo/alloc2/generation.hpp>
+#include <xo/alloc2/Generation.hpp>
 #include <xo/alloc2/role.hpp>
 #include <xo/facet/obj.hpp>
 #include <xo/facet/facet_implementation.hpp>
diff --git a/include/xo/alloc2/gc/ICollector_Xfer.hpp b/include/xo/alloc2/gc/ICollector_Xfer.hpp
index bce805b..5bd9d9c 100644
--- a/include/xo/alloc2/gc/ICollector_Xfer.hpp
+++ b/include/xo/alloc2/gc/ICollector_Xfer.hpp
@@ -14,7 +14,7 @@
 #pragma once
 
 #include <xo/alloc2/Allocator.hpp>
-#include <xo/alloc2/generation.hpp>
+#include <xo/alloc2/Generation.hpp>
 #include <xo/alloc2/role.hpp>
 
 namespace xo {