diff --git a/libevmasm/AssemblyItem.cpp b/libevmasm/AssemblyItem.cpp
index cfe91be09..649630217 100644
--- a/libevmasm/AssemblyItem.cpp
+++ b/libevmasm/AssemblyItem.cpp
@@ -17,8 +17,6 @@
 
 #include <libevmasm/AssemblyItem.h>
 
-#include <libevmasm/SemanticInformation.h>
-
 #include <libdevcore/CommonData.h>
 #include <libdevcore/FixedHash.h>
 
@@ -112,7 +110,7 @@ bool AssemblyItem::canBeFunctional() const
 	switch (m_type)
 	{
 	case Operation:
-		return !SemanticInformation::isDupInstruction(*this) && !SemanticInformation::isSwapInstruction(*this);
+		return !isDupInstruction(instruction()) && !isSwapInstruction(instruction());
 	case Push:
 	case PushString:
 	case PushTag:
diff --git a/libevmasm/SemanticInformation.cpp b/libevmasm/SemanticInformation.cpp
index ceb3fbdd0..83cfe2c6d 100644
--- a/libevmasm/SemanticInformation.cpp
+++ b/libevmasm/SemanticInformation.cpp
@@ -90,14 +90,14 @@ bool SemanticInformation::isDupInstruction(AssemblyItem const& _item)
 {
 	if (_item.type() != Operation)
 		return false;
-	return Instruction::DUP1 <= _item.instruction() && _item.instruction() <= Instruction::DUP16;
+	return solidity::isDupInstruction(_item.instruction());
 }
 
 bool SemanticInformation::isSwapInstruction(AssemblyItem const& _item)
 {
 	if (_item.type() != Operation)
 		return false;
-	return Instruction::SWAP1 <= _item.instruction() && _item.instruction() <= Instruction::SWAP16;
+	return solidity::isSwapInstruction(_item.instruction());
 }
 
 bool SemanticInformation::isJumpInstruction(AssemblyItem const& _item)