diff --git a/mlir/include/mlir/Dialect/EmitC/IR/EmitCTypes.td b/mlir/include/mlir/Dialect/EmitC/IR/EmitCTypes.td
--- a/mlir/include/mlir/Dialect/EmitC/IR/EmitCTypes.td
+++ b/mlir/include/mlir/Dialect/EmitC/IR/EmitCTypes.td
@@ -27,7 +27,7 @@
 }
 
 def EmitC_OpaqueType : EmitC_Type<"Opaque", "opaque"> {
-  let summary = "An opaque type";
+  let summary = "EmitC opaque type";
 
   let description = [{
     An opaque data type of which the value gets emitted as is.