diff --git a/CMakeLists.txt b/CMakeLists.txt
index a6edfa04ac930b99c370b8493f3b48235aa86724..505de972b913d287989b0f63717cbb3616616230 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -655,6 +655,7 @@ set(ZIG_STAGE2_SOURCES
     "${CMAKE_SOURCE_DIR}/src/print_env.zig"
     "${CMAKE_SOURCE_DIR}/src/print_targets.zig"
     "${CMAKE_SOURCE_DIR}/src/print_zir.zig"
+    "${CMAKE_SOURCE_DIR}/src/register_manager.zig"
     "${CMAKE_SOURCE_DIR}/src/stage1.zig"
     "${CMAKE_SOURCE_DIR}/src/target.zig"
     "${CMAKE_SOURCE_DIR}/src/tracy.zig"