diff --git a/hilti/toolchain/src/compiler/optimizer.cc b/hilti/toolchain/src/compiler/optimizer.cc
index ea922a700..0ba2b8c2e 100644
--- a/hilti/toolchain/src/compiler/optimizer.cc
+++ b/hilti/toolchain/src/compiler/optimizer.cc
@@ -52,11 +52,6 @@
 #include <hilti/base/util.h>
 #include <hilti/base/visitor.h>
 
-#include "ast/declarations/function.h"
-#include "ast/scope-lookup.h"
-#include "ast/types/struct.h"
-#include "base/util.h"
-
 namespace hilti {
 
 namespace logging::debug {