diff --git a/mpact/sim/decoder/instruction_set.h b/mpact/sim/decoder/instruction_set.h
index 825eeba..ea92ef3 100644
--- a/mpact/sim/decoder/instruction_set.h
+++ b/mpact/sim/decoder/instruction_set.h
@@ -21,7 +21,6 @@
 #include <vector>
 
 #include "absl/container/btree_map.h"
-#include "absl/container/btree_set.h"
 #include "absl/container/flat_hash_map.h"
 #include "absl/status/status.h"
 #include "absl/strings/string_view.h"