diff --git a/cpp/src/phonenumbers/regex_based_matcher.cc b/cpp/src/phonenumbers/regex_based_matcher.cc
index 897b15610..4c4b1f822 100644
--- a/cpp/src/phonenumbers/regex_based_matcher.cc
+++ b/cpp/src/phonenumbers/regex_based_matcher.cc
@@ -16,7 +16,6 @@
 
 #include "phonenumbers/regex_based_matcher.h"
 
-#include <memory>
 #include <string>
 
 #include "phonenumbers/base/memory/scoped_ptr.h"
diff --git a/cpp/src/phonenumbers/regex_based_matcher.h b/cpp/src/phonenumbers/regex_based_matcher.h
index ee3db7045..81b49efca 100644
--- a/cpp/src/phonenumbers/regex_based_matcher.h
+++ b/cpp/src/phonenumbers/regex_based_matcher.h
@@ -17,7 +17,6 @@
 #ifndef I18N_PHONENUMBERS_REGEX_BASED_MATCHER_H_
 #define I18N_PHONENUMBERS_REGEX_BASED_MATCHER_H_
 
-#include <memory>
 #include <string>
 
 #include "phonenumbers/base/basictypes.h"
diff --git a/cpp/test/phonenumbers/geocoding/area_code_map_test.cc b/cpp/test/phonenumbers/geocoding/area_code_map_test.cc
index 97369a6b1..9d552f3c1 100644
--- a/cpp/test/phonenumbers/geocoding/area_code_map_test.cc
+++ b/cpp/test/phonenumbers/geocoding/area_code_map_test.cc
@@ -29,10 +29,6 @@
 namespace i18n {
 namespace phonenumbers {
 
-using std::map;
-using std::string;
-using std::vector;
-
 namespace {
 
 void MakeCodeMap(const PrefixDescriptions* descriptions,