diff --git a/mlir/include/mlir/Dialect/EmitC/IR/EmitC.td b/mlir/include/mlir/Dialect/EmitC/IR/EmitC.td
--- a/mlir/include/mlir/Dialect/EmitC/IR/EmitC.td
+++ b/mlir/include/mlir/Dialect/EmitC/IR/EmitC.td
@@ -148,7 +148,7 @@
 }
 
 def EmitC_IncludeOp
-    : EmitC_Op<"include", [Pure, HasParent<"ModuleOp">]> {
+    : EmitC_Op<"include", [HasParent<"ModuleOp">]> {
   let summary = "Include operation";
   let description = [{
     The `include` operation allows to define a source file inclusion via the
diff --git a/mlir/test/Dialect/EmitC/ops.mlir b/mlir/test/Dialect/EmitC/ops.mlir
--- a/mlir/test/Dialect/EmitC/ops.mlir
+++ b/mlir/test/Dialect/EmitC/ops.mlir
@@ -1,5 +1,8 @@
 // RUN: mlir-opt %s | mlir-opt | FileCheck %s
+// RUN: mlir-opt %s -canonicalize | FileCheck %s
 
+// CHECK: emitc.include <"test.h">
+// CHECK: emitc.include "test.h"
 emitc.include <"test.h">
 emitc.include "test.h"