diff --git a/mlir/lib/Conversion/TosaToLinalg/TosaToLinalgPass.cpp b/mlir/lib/Conversion/TosaToLinalg/TosaToLinalgPass.cpp
--- a/mlir/lib/Conversion/TosaToLinalg/TosaToLinalgPass.cpp
+++ b/mlir/lib/Conversion/TosaToLinalg/TosaToLinalgPass.cpp
@@ -58,6 +58,7 @@
     target.addLegalOp<tosa::SliceOp>();
     target.addLegalOp<tosa::ReshapeOp>();
     target.addLegalOp<tosa::PadOp>();
+    target.addLegalOp<tosa::ConcatOp>();
 
     target.markUnknownOpDynamicallyLegal([](Operation *) { return true; });