diff --git a/mlir/include/mlir/Dialect/Linalg/IR/Linalg.h b/mlir/include/mlir/Dialect/Linalg/IR/Linalg.h
--- a/mlir/include/mlir/Dialect/Linalg/IR/Linalg.h
+++ b/mlir/include/mlir/Dialect/Linalg/IR/Linalg.h
@@ -74,9 +74,6 @@
 void getDimsOfType(Operation *op, StringRef iteratorTypeName,
                    SmallVectorImpl<unsigned> &res);
 
-namespace detail {
-LogicalResult verifyStructuredOpInterface(Operation *op);
-} // namespace detail
 } // namespace linalg
 } // namespace mlir