diff --git a/lib/Bytecode/Reader/ConstantReader.cpp b/lib/Bytecode/Reader/ConstantReader.cpp
index 097bdbe..00f44b3 100644
--- a/lib/Bytecode/Reader/ConstantReader.cpp
+++ b/lib/Bytecode/Reader/ConstantReader.cpp
@@ -182,6 +182,8 @@
     } else if (Opcode == Instruction::GetElementPtr) { // GetElementPtr
       std::vector<Constant*> IdxList(ArgVec.begin()+1, ArgVec.end());
       return ConstantExpr::getGetElementPtr(ArgVec[0], IdxList);
+    } else if (Opcode == Instruction::Shl || Opcode == Instruction::Shr) {
+      return ConstantExpr::getShift(Opcode, ArgVec[0], ArgVec[1]);
     } else {                            // All other 2-operand expressions
       return ConstantExpr::get(Opcode, ArgVec[0], ArgVec[1]);
     }