diff --git a/mlir/tools/mlir-tblgen/OpDocGen.cpp b/mlir/tools/mlir-tblgen/OpDocGen.cpp
--- a/mlir/tools/mlir-tblgen/OpDocGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpDocGen.cpp
@@ -21,6 +21,7 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FormatVariadic.h"
 #include "llvm/Support/Regex.h"
@@ -155,8 +156,9 @@
 }
 
 static void emitOpDoc(const Operator &op, raw_ostream &os) {
+  // Print out the operation name and C++ class name.
   os << llvm::formatv("### `{0}` ({1})\n", op.getOperationName(),
-                      op.getQualCppClassName());
+                      op.getCppClassName());
 
   // Emit the summary, syntax, and description if present.
   if (op.hasSummary())