diff --git a/solidityCompiler.cpp b/solidityCompiler.cpp
index 26bfc7cb6..0d9d59c1c 100644
--- a/solidityCompiler.cpp
+++ b/solidityCompiler.cpp
@@ -212,11 +212,9 @@ BOOST_AUTO_TEST_CASE(unary_operators)
 					   byte(eth::Instruction::PUSH1), 0x1,
 					   byte(eth::Instruction::SWAP1),
 					   byte(eth::Instruction::SUB),
-					   byte(eth::Instruction::NEG),
-					   byte(eth::Instruction::PUSH1), 0x1,
 					   byte(eth::Instruction::PUSH1), 0x0,
 					   byte(eth::Instruction::SUB),
-					   byte(eth::Instruction::XOR), // bitwise not
+					   byte(eth::Instruction::BNOT),
 					   byte(eth::Instruction::PUSH1), 0x2,
 					   byte(eth::Instruction::EQ),
 					   byte(eth::Instruction::NOT)});