diff --git a/src/maple_util/include/literal_str_name.h b/src/maple_util/include/literal_str_name.h
index 623a5e6f45d1d153cb959b972916eb37c4c183b2..6705d693c0df1769c569e5c2c3e04c5a8d67a5fa 100644
--- a/src/maple_util/include/literal_str_name.h
+++ b/src/maple_util/include/literal_str_name.h
@@ -27,7 +27,7 @@
 
 const std::string kConstString = "_C_STR_";
 const std::string kConstStringPtr = "_PTR_C_STR_";
-constexpr int  kConstStringLen = 7;
+constexpr int kConstStringLen = 7;
 const std::string kLocalStringPrefix = "L_STR_";
 
 union DigestHash {
diff --git a/src/maple_util/include/safe_ptr.h b/src/maple_util/include/safe_ptr.h
index 42f970458c5b54881a0e925ee74f64bdc932eca3..3ac970ea280e099fc6574d23533b02e07e189aa8 100644
--- a/src/maple_util/include/safe_ptr.h
+++ b/src/maple_util/include/safe_ptr.h
@@ -14,10 +14,8 @@
  */
 #ifndef MAPLE_UTIL_SAFE_PTR_H
 #define MAPLE_UTIL_SAFE_PTR_H
-#include <cassert>
 #include <mpl_logging.h>
 #include "ptr.h"
-#include "mir_nodes.h"
 
 namespace maple { namespace utils {