diff --git a/protoc-c/c_bytes_field.cc b/protoc-c/c_bytes_field.cc
index 603a2ca..716e6a8 100644
--- a/protoc-c/c_bytes_field.cc
+++ b/protoc-c/c_bytes_field.cc
@@ -74,7 +74,7 @@ namespace c {
 using internal::WireFormat;
 
 void SetBytesVariables(const FieldDescriptor* descriptor,
-                        map<string, string>* variables) {
+                        std::map<string, string>* variables) {
   (*variables)["name"] = FieldName(descriptor);
   (*variables)["default"] =
     "\"" + CEscape(descriptor->default_value_string()) + "\"";
diff --git a/protoc-c/c_bytes_field.h b/protoc-c/c_bytes_field.h
index e4b3fa0..c4a71e8 100644
--- a/protoc-c/c_bytes_field.h
+++ b/protoc-c/c_bytes_field.h
@@ -86,7 +86,7 @@ class BytesFieldGenerator : public FieldGenerator {
   void GenerateStaticInit(io::Printer* printer) const;
 
  private:
-  map<string, string> variables_;
+  std::map<string, string> variables_;
 
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(BytesFieldGenerator);
 };
diff --git a/protoc-c/c_enum.cc b/protoc-c/c_enum.cc
index d86366e..fa2789a 100644
--- a/protoc-c/c_enum.cc
+++ b/protoc-c/c_enum.cc
@@ -81,7 +81,7 @@ EnumGenerator::EnumGenerator(const EnumDescriptor* descriptor,
 EnumGenerator::~EnumGenerator() {}
 
 void EnumGenerator::GenerateDefinition(io::Printer* printer) {
-  map<string, string> vars;
+  std::map<string, string> vars;
   vars["classname"] = FullNameToC(descriptor_->full_name());
   vars["shortname"] = descriptor_->name();
   vars["uc_name"] = FullNameToUpper(descriptor_->full_name());
@@ -126,7 +126,7 @@ void EnumGenerator::GenerateDefinition(io::Printer* printer) {
 }
 
 void EnumGenerator::GenerateDescriptorDeclarations(io::Printer* printer) {
-  map<string, string> vars;
+  std::map<string, string> vars;
   if (dllexport_decl_.empty()) {
     vars["dllexport"] = "";
   } else {
@@ -149,7 +149,7 @@ struct ValueIndex
 void EnumGenerator::GenerateValueInitializer(io::Printer *printer, int index)
 {
   const EnumValueDescriptor *vd = descriptor_->value(index);
-  map<string, string> vars;
+  std::map<string, string> vars;
   bool optimize_code_size = descriptor_->file()->options().has_optimize_for() &&
     descriptor_->file()->options().optimize_for() ==
     FileOptions_OptimizeMode_CODE_SIZE;
@@ -182,7 +182,7 @@ static int compare_value_indices_by_name(const void *a, const void *b)
 }
 
 void EnumGenerator::GenerateEnumDescriptor(io::Printer* printer) {
-  map<string, string> vars;
+  std::map<string, string> vars;
   vars["fullname"] = descriptor_->full_name();
   vars["lcclassname"] = FullNameToLower(descriptor_->full_name());
   vars["cname"] = FullNameToC(descriptor_->full_name());
diff --git a/protoc-c/c_enum_field.cc b/protoc-c/c_enum_field.cc
index aabad8d..c99583d 100644
--- a/protoc-c/c_enum_field.cc
+++ b/protoc-c/c_enum_field.cc
@@ -75,7 +75,7 @@ using internal::WireFormat;
 // TODO(kenton):  Factor out a "SetCommonFieldVariables()" to get rid of
 //   repeat code between this and the other field types.
 void SetEnumVariables(const FieldDescriptor* descriptor,
-                      map<string, string>* variables) {
+                      std::map<string, string>* variables) {
 
   (*variables)["name"] = FieldName(descriptor);
   (*variables)["type"] = FullNameToC(descriptor->enum_type()->full_name());
diff --git a/protoc-c/c_enum_field.h b/protoc-c/c_enum_field.h
index ad03e83..11df682 100644
--- a/protoc-c/c_enum_field.h
+++ b/protoc-c/c_enum_field.h
@@ -84,7 +84,7 @@ class EnumFieldGenerator : public FieldGenerator {
   void GenerateStaticInit(io::Printer* printer) const;
 
  private:
-  map<string, string> variables_;
+  std::map<string, string> variables_;
 
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumFieldGenerator);
 };
diff --git a/protoc-c/c_field.cc b/protoc-c/c_field.cc
index 0e9b1f9..9fa56ef 100644
--- a/protoc-c/c_field.cc
+++ b/protoc-c/c_field.cc
@@ -106,7 +106,7 @@ void FieldGenerator::GenerateDescriptorInitializerGeneric(io::Printer* printer,
 							  const string &type_macro,
 							  const string &descriptor_addr) const
 {
-  map<string, string> variables;
+  std::map<string, string> variables;
   variables["TYPE"] = type_macro;
   variables["classname"] = FullNameToC(FieldScope(descriptor_)->full_name());
   variables["name"] = FieldName(descriptor_);
diff --git a/protoc-c/c_helpers.cc b/protoc-c/c_helpers.cc
index 8398b50..b79b5b0 100644
--- a/protoc-c/c_helpers.cc
+++ b/protoc-c/c_helpers.cc
@@ -268,7 +268,7 @@ const char* const kKeywordList[] = {
 };
 
 std::set<string> MakeKeywordsMap() {
-  set<string> result;
+  std::set<string> result;
   for (int i = 0; i < GOOGLE_ARRAYSIZE(kKeywordList); i++) {
     result.insert(kKeywordList[i]);
   }
@@ -365,7 +365,7 @@ string GetLabelName(FieldDescriptor::Label label) {
 unsigned
 WriteIntRanges(io::Printer* printer, int n_values, const int *values, const string &name)
 {
-  map<string, string> vars;
+  std::map<string, string> vars;
   vars["name"] = name;
   if (n_values > 0) {
     int n_ranges = 1;
@@ -504,7 +504,7 @@ void SplitStringToIteratorUsing(const string& full,
 void SplitStringUsing(const string& full,
                       const char* delim,
                       vector<string>* result) {
-  back_insert_iterator< vector<string> > it(*result);
+  std::back_insert_iterator< vector<string> > it(*result);
   SplitStringToIteratorUsing(full, delim, it);
 }
 
diff --git a/protoc-c/c_message.cc b/protoc-c/c_message.cc
index 4c27cd1..6b22c71 100755
--- a/protoc-c/c_message.cc
+++ b/protoc-c/c_message.cc
@@ -388,7 +388,7 @@ GenerateHelperFunctionDefinitions(io::Printer* printer, bool is_submessage)
 
 void MessageGenerator::
 GenerateMessageDescriptor(io::Printer* printer) {
-    map<string, string> vars;
+    std::map<string, string> vars;
     vars["fullname"] = descriptor_->full_name();
     vars["classname"] = FullNameToC(descriptor_->full_name());
     vars["lcclassname"] = FullNameToLower(descriptor_->full_name());
diff --git a/protoc-c/c_message_field.cc b/protoc-c/c_message_field.cc
index a538ca1..148cc9a 100644
--- a/protoc-c/c_message_field.cc
+++ b/protoc-c/c_message_field.cc
@@ -83,7 +83,7 @@ MessageFieldGenerator::~MessageFieldGenerator() {}
 
 void MessageFieldGenerator::GenerateStructMembers(io::Printer* printer) const
 {
-  map<string, string> vars;
+  std::map<string, string> vars;
   vars["name"] = FieldName(descriptor_);
   vars["type"] = FullNameToC(descriptor_->message_type()->full_name());
   vars["deprecated"] = FieldDeprecated(descriptor_);
diff --git a/protoc-c/c_primitive_field.cc b/protoc-c/c_primitive_field.cc
index a3fb1ae..dfbc47c 100644
--- a/protoc-c/c_primitive_field.cc
+++ b/protoc-c/c_primitive_field.cc
@@ -80,7 +80,7 @@ PrimitiveFieldGenerator::~PrimitiveFieldGenerator() {}
 void PrimitiveFieldGenerator::GenerateStructMembers(io::Printer* printer) const
 {
   string c_type;
-  map<string, string> vars;
+  std::map<string, string> vars;
   switch (descriptor_->type()) {
     case FieldDescriptor::TYPE_SINT32  : 
     case FieldDescriptor::TYPE_SFIXED32: 
@@ -149,7 +149,7 @@ string PrimitiveFieldGenerator::GetDefaultValue() const
 }
 void PrimitiveFieldGenerator::GenerateStaticInit(io::Printer* printer) const
 {
-  map<string, string> vars;
+  std::map<string, string> vars;
   if (descriptor_->has_default_value()) {
     vars["default_value"] = GetDefaultValue();
   } else {
diff --git a/protoc-c/c_service.h b/protoc-c/c_service.h
index 1eb982e..6f1798c 100644
--- a/protoc-c/c_service.h
+++ b/protoc-c/c_service.h
@@ -99,7 +99,7 @@ class ServiceGenerator {
   void GenerateCallersImplementations(io::Printer* printer);
 
   const ServiceDescriptor* descriptor_;
-  map<string, string> vars_;
+  std::map<string, string> vars_;
 
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ServiceGenerator);
 };
diff --git a/protoc-c/c_string_field.cc b/protoc-c/c_string_field.cc
index 4075db1..2ed448b 100644
--- a/protoc-c/c_string_field.cc
+++ b/protoc-c/c_string_field.cc
@@ -74,7 +74,7 @@ namespace c {
 using internal::WireFormat;
 
 void SetStringVariables(const FieldDescriptor* descriptor,
-                        map<string, string>* variables) {
+                        std::map<string, string>* variables) {
   (*variables)["name"] = FieldName(descriptor);
   (*variables)["default"] = FullNameToLower(descriptor->full_name())
 	+ "__default_value";
diff --git a/protoc-c/c_string_field.h b/protoc-c/c_string_field.h
index c8f4ee5..68f0d25 100644
--- a/protoc-c/c_string_field.h
+++ b/protoc-c/c_string_field.h
@@ -86,7 +86,7 @@ class StringFieldGenerator : public FieldGenerator {
   void GenerateStaticInit(io::Printer* printer) const;
 
  private:
-  map<string, string> variables_;
+  std::map<string, string> variables_;
 
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(StringFieldGenerator);
 };