diff --git a/tools/binpac/src/pac_array.cc b/tools/binpac/src/pac_array.cc
index d37a6c1a4d..82e4f8c6fb 100644
--- a/tools/binpac/src/pac_array.cc
+++ b/tools/binpac/src/pac_array.cc
@@ -356,7 +356,7 @@ void ArrayType::GenInitCode(Output* out_cc, Env* env)
 	{
 	// Do not initiate the array here
 	// out_cc->println("%s = new %s;", lvalue(), vector_str_.c_str());
-	out_cc->println("%s = 0;", lvalue());
+	out_cc->println("%s = nullptr;", lvalue());
 
 	Type::GenInitCode(out_cc, env);
 	if ( incremental_parsing() )
@@ -563,7 +563,7 @@ void ArrayType::DoGenParseCode(Output* out_cc, Env* env, const DataPtr& data, in
 		GenUntilCheck(out_cc, env, attr_until_element_expr_, false);
 
 	if ( elemtype_->IsPointerType() )
-		out_cc->println("%s = 0;", env->LValue(elem_var()));
+		out_cc->println("%s = nullptr;", env->LValue(elem_var()));
 
 	out_cc->println("}");
 	out_cc->dec_indent();
@@ -621,7 +621,7 @@ void ArrayType::GenUntilCheck(Output* out_cc, Env* env, Expr* until_expr, bool d
 		if ( delete_elem )
 			elemtype_->GenCleanUpCode(out_cc, env);
 		else
-			out_cc->println("%s = 0;", env->LValue(elem_var()));
+			out_cc->println("%s = nullptr;", env->LValue(elem_var()));
 		}
 
 	out_cc->println("goto %s;", end_of_array_loop_label_.c_str());
diff --git a/tools/binpac/src/pac_exttype.cc b/tools/binpac/src/pac_exttype.cc
index c048acc7a6..32f896e994 100644
--- a/tools/binpac/src/pac_exttype.cc
+++ b/tools/binpac/src/pac_exttype.cc
@@ -42,8 +42,11 @@ string ExternType::EvalMember(const ID* member_id) const
 
 void ExternType::GenInitCode(Output* out_cc, Env* env)
 	{
-	if ( IsNumericType() || IsPointerType() )
+	if ( IsNumericType() )
 		out_cc->println("%s = 0;", env->LValue(value_var()));
+	else if ( IsPointerType() )
+		out_cc->println("%s = nullptr;", env->LValue(value_var()));
+
 	Type::GenInitCode(out_cc, env);
 	}
 
diff --git a/tools/binpac/src/pac_flow.cc b/tools/binpac/src/pac_flow.cc
index ddf6029b01..75a42c92fd 100644
--- a/tools/binpac/src/pac_flow.cc
+++ b/tools/binpac/src/pac_flow.cc
@@ -113,8 +113,8 @@ void FlowDecl::GenInitCode(Output* out_cc)
 	{
 	AnalyzerDecl::GenInitCode(out_cc);
 
-	out_cc->println("%s = 0;", env_->LValue(dataunit_id));
-	out_cc->println("%s = 0;", env_->LValue(analyzer_context_id));
+	out_cc->println("%s = nullptr;", env_->LValue(dataunit_id));
+	out_cc->println("%s = nullptr;", env_->LValue(analyzer_context_id));
 
 	if ( dataunit_->type() == AnalyzerDataUnit::FLOWUNIT )
 		{
@@ -147,7 +147,7 @@ void FlowDecl::GenEOFFunc(Output* out_h, Output* out_cc)
 	if ( dataunit_->type() == AnalyzerDataUnit::FLOWUNIT )
 		{
 		out_cc->println("%s->set_eof();", env_->LValue(flow_buffer_id));
-		out_cc->println("%s(0, 0);", kNewData);
+		out_cc->println("%s(nullptr, nullptr);", kNewData);
 		}
 
 	out_cc->println("}");
diff --git a/tools/binpac/src/pac_paramtype.cc b/tools/binpac/src/pac_paramtype.cc
index 7fe61fe128..b9d2175b65 100644
--- a/tools/binpac/src/pac_paramtype.cc
+++ b/tools/binpac/src/pac_paramtype.cc
@@ -154,7 +154,7 @@ bool ParameterizedType::RequiresAnalyzerContext()
 void ParameterizedType::GenInitCode(Output* out_cc, Env* env)
 	{
 	ASSERT(persistent());
-	out_cc->println("%s = 0;", env->LValue(value_var()));
+	out_cc->println("%s = nullptr;", env->LValue(value_var()));
 	Type::GenInitCode(out_cc, env);
 	}
 
@@ -165,7 +165,7 @@ void ParameterizedType::GenCleanUpCode(Output* out_cc, Env* env)
 		out_cc->println("Unref(%s);", lvalue());
 	else
 		out_cc->println("delete %s;", lvalue());
-	out_cc->println("%s = 0;", lvalue());
+	out_cc->println("%s = nullptr;", lvalue());
 	Type::GenCleanUpCode(out_cc, env);
 	}
 
@@ -206,7 +206,7 @@ void ParameterizedType::DoGenParseCode(Output* out_cc, Env* env, const DataPtr&
 		{
 		ASSERT(! ref_type->incremental_input());
 		parse_func = kParseFuncWithoutBuffer;
-		parse_params = "0, 0";
+		parse_params = "nullptr, nullptr";
 		}
 	else if ( ref_type->incremental_input() )
 		{