diff --git a/libsolidity/analysis/GlobalContext.cpp b/libsolidity/analysis/GlobalContext.cpp
index c85c6291c6a1..9294a5769ebf 100644
--- a/libsolidity/analysis/GlobalContext.cpp
+++ b/libsolidity/analysis/GlobalContext.cpp
@@ -356,12 +356,10 @@ namespace dev
             parameterTypes.push_back(TypeProvider::array(DataLocation::Memory, TypeProvider::uint256()));
 
             TypePointers returnParameterTypes;
-            returnParameterTypes.push_back(TypeProvider::boolean());
             strings parameterNames;
             parameterNames.push_back("srList");
             parameterNames.push_back("tronpowerList");
             strings returnParameterNames;
-            returnParameterNames.push_back("ok");
 
             m_magicVariables.push_back(make_shared<MagicVariableDeclaration>("vote", TypeProvider::function(
                     parameterTypes,
diff --git a/libsolidity/codegen/ExpressionCompiler.cpp b/libsolidity/codegen/ExpressionCompiler.cpp
index 047e6484eae3..2c9d7b7ea729 100644
--- a/libsolidity/codegen/ExpressionCompiler.cpp
+++ b/libsolidity/codegen/ExpressionCompiler.cpp
@@ -1247,7 +1247,7 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
                  m_context << Instruction::DUP1 << Instruction::MLOAD;
              }
              m_context << Instruction::NATIVEVOTE;
-             m_context << Instruction::DUP1 << Instruction::ISZERO;
+             m_context << Instruction::ISZERO;
              m_context.appendConditionalRevert(true);
              break;
          }