diff --git a/mlir/tools/mlir-tblgen/OpFormatGen.cpp b/mlir/tools/mlir-tblgen/OpFormatGen.cpp
--- a/mlir/tools/mlir-tblgen/OpFormatGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpFormatGen.cpp
@@ -166,7 +166,7 @@
 
 /// This class represents the `regions` directive. This directive represents
 /// all of the regions of an operation.
-using RegionsDirective = DirectiveElement<Element::Kind::ResultsDirective>;
+using RegionsDirective = DirectiveElement<Element::Kind::RegionsDirective>;
 
 /// This class represents the `results` directive. This directive represents
 /// all of the results of an operation.