diff --git a/src/library/compiler/CMakeLists.txt b/src/library/compiler/CMakeLists.txt
index 7cb0ce7e14..df179a6559 100644
--- a/src/library/compiler/CMakeLists.txt
+++ b/src/library/compiler/CMakeLists.txt
@@ -4,5 +4,5 @@ add_library(compiler OBJECT old_util.cpp eta_expansion.cpp preprocess.cpp
   lambda_lifting.cpp simp_inductive.cpp nat_value.cpp
   vm_compiler.cpp old_cse.cpp elim_unused_lets.cpp extract_values.cpp init_module.cpp
   ## New compiler
-  lc_util.cpp lcnf.cpp csimp.cpp elim_dead_let.cpp cse.cpp
+  util.cpp lcnf.cpp csimp.cpp elim_dead_let.cpp cse.cpp
   )
diff --git a/src/library/compiler/cse.cpp b/src/library/compiler/cse.cpp
index b60e17eb46..69715f050c 100644
--- a/src/library/compiler/cse.cpp
+++ b/src/library/compiler/cse.cpp
@@ -10,7 +10,7 @@ Author: Leonardo de Moura
 #include "kernel/instantiate.h"
 #include "kernel/abstract.h"
 #include "kernel/expr_maps.h"
-#include "library/compiler/lc_util.h"
+#include "library/compiler/util.h"
 
 namespace lean {
 static name * g_cse_fresh = nullptr;
diff --git a/src/library/compiler/csimp.cpp b/src/library/compiler/csimp.cpp
index 6b22939373..27d11e63fc 100644
--- a/src/library/compiler/csimp.cpp
+++ b/src/library/compiler/csimp.cpp
@@ -9,7 +9,7 @@ Author: Leonardo de Moura
 #include "kernel/instantiate.h"
 #include "library/util.h"
 #include "library/constants.h"
-#include "library/compiler/lc_util.h"
+#include "library/compiler/util.h"
 
 namespace lean {
 class csimp_fn {
diff --git a/src/library/compiler/lcnf.cpp b/src/library/compiler/lcnf.cpp
index 42f47f0437..e38bdf0c6c 100644
--- a/src/library/compiler/lcnf.cpp
+++ b/src/library/compiler/lcnf.cpp
@@ -6,6 +6,7 @@ Author: Leonardo de Moura
 */
 #include <algorithm>
 #include "runtime/flet.h"
+#include "runtime/sstream.h"
 #include "kernel/type_checker.h"
 #include "kernel/instantiate.h"
 #include "library/expr_lt.h"
@@ -13,10 +14,7 @@ Author: Leonardo de Moura
 #include "library/aux_recursors.h"
 #include "library/constants.h"
 #include "library/projection.h"
-#include "library/compiler/lc_util.h"
-
-#include "library/trace.h"
-#include "kernel/for_each_fn.h"
+#include "library/compiler/util.h"
 
 namespace lean {
 class to_lcnf_fn {
diff --git a/src/library/compiler/preprocess.cpp b/src/library/compiler/preprocess.cpp
index 0a22226311..51da8061ac 100644
--- a/src/library/compiler/preprocess.cpp
+++ b/src/library/compiler/preprocess.cpp
@@ -36,7 +36,7 @@ Author: Leonardo de Moura
 #include "library/compiler/extract_values.h"
 #include "library/compiler/old_cse.h"
 
-#include "library/compiler/lc_util.h"
+#include "library/compiler/util.h"
 #include "library/compiler/lcnf.h"
 #include "library/compiler/csimp.h"
 #include "library/compiler/elim_dead_let.h"
diff --git a/src/library/compiler/lc_util.cpp b/src/library/compiler/util.cpp
similarity index 100%
rename from src/library/compiler/lc_util.cpp
rename to src/library/compiler/util.cpp
diff --git a/src/library/compiler/lc_util.h b/src/library/compiler/util.h
similarity index 100%
rename from src/library/compiler/lc_util.h
rename to src/library/compiler/util.h