diff --git a/mlir/docs/Tutorials/Toy/Ch-5.md b/mlir/docs/Tutorials/Toy/Ch-5.md
--- a/mlir/docs/Tutorials/Toy/Ch-5.md
+++ b/mlir/docs/Tutorials/Toy/Ch-5.md
@@ -147,7 +147,7 @@
 
   // Now that the conversion target has been defined, we just need to provide
   // the set of patterns that will lower the Toy operations.
-  mlir::RewritePatternSet patterns;
+  mlir::RewritePatternSet patterns(&getContext());
   patterns.add<..., TransposeOpLowering>(&getContext());
 
   ...
diff --git a/mlir/docs/Tutorials/Toy/Ch-6.md b/mlir/docs/Tutorials/Toy/Ch-6.md
--- a/mlir/docs/Tutorials/Toy/Ch-6.md
+++ b/mlir/docs/Tutorials/Toy/Ch-6.md
@@ -90,7 +90,7 @@
 by relying on [transitive lowering](../../../getting_started/Glossary.md#transitive-lowering).
 
 ```c++
-  mlir::RewritePatternSet patterns;
+  mlir::RewritePatternSet patterns(&getContext());
   mlir::populateAffineToStdConversionPatterns(patterns, &getContext());
   mlir::populateLoopToStdConversionPatterns(patterns, &getContext());
   mlir::populateStdToLLVMConversionPatterns(typeConverter, patterns);