diff --git a/mlir/docs/DialectConversion.md b/mlir/docs/DialectConversion.md
--- a/mlir/docs/DialectConversion.md
+++ b/mlir/docs/DialectConversion.md
@@ -94,7 +94,7 @@
 
     /// Mark all operations within Affine dialect have dynamic legality
     /// constraints.
-    addDynamicallyLegalDialects<AffineDialect>();
+    addDynamicallyLegalDialect<AffineDialect>();
 
     /// Mark `std.return` as dynamically legal.
     addDynamicallyLegalOp<ReturnOp>();