diff --git a/src/transform/auto_schedule/memory_detector.h b/src/transform/auto_schedule/memory_detector.h
index 8a37fc6eea..2f9127f82a 100644
--- a/src/transform/auto_schedule/memory_detector.h
+++ b/src/transform/auto_schedule/memory_detector.h
@@ -264,6 +264,7 @@ class MemoryAccessDetector : public StmtExprVisitor {
   }
 
   void VisitStmt_(const LetStmtNode *op) override {
+    VisitExpr(op->value);
     let_bindings_[op->var.get()] = op->value;
     UpdateWriteVar(op->var);
     StmtExprVisitor::VisitStmt(op->body);