diff --git a/source/opt/mem_pass.cpp b/source/opt/mem_pass.cpp
index 6f23c932fd..13364da0ca 100644
--- a/source/opt/mem_pass.cpp
+++ b/source/opt/mem_pass.cpp
@@ -117,8 +117,8 @@ ir::Instruction* MemPass::GetPtr(uint32_t ptrId, uint32_t* varId) {
 }
 
 ir::Instruction* MemPass::GetPtr(ir::Instruction* ip, uint32_t* varId) {
-  const SpvOp op = ip->opcode();
-  assert(op == SpvOpStore || op == SpvOpLoad || op == SpvOpImageTexelPointer);
+  assert(ip->opcode() == SpvOpStore || ip->opcode() == SpvOpLoad ||
+         ip->opcode() == SpvOpImageTexelPointer);
 
   // All of these opcode place the pointer in position 0.
   const uint32_t ptrId = ip->GetSingleWordInOperand(0);