diff --git a/mlir/include/mlir/Dialect/Tosa/IR/TosaOps.td b/mlir/include/mlir/Dialect/Tosa/IR/TosaOps.td
--- a/mlir/include/mlir/Dialect/Tosa/IR/TosaOps.td
+++ b/mlir/include/mlir/Dialect/Tosa/IR/TosaOps.td
@@ -1101,6 +1101,8 @@
   );
 
   let builders = [Tosa_UnaryOpQuantInfoBuilder];
+
+  let hasFolder = 1;
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/mlir/lib/Dialect/Tosa/IR/TosaCanonicalizations.cpp b/mlir/lib/Dialect/Tosa/IR/TosaCanonicalizations.cpp
--- a/mlir/lib/Dialect/Tosa/IR/TosaCanonicalizations.cpp
+++ b/mlir/lib/Dialect/Tosa/IR/TosaCanonicalizations.cpp
@@ -1017,3 +1017,13 @@
 
   return {};
 }
+
+OpFoldResult tosa::NegateOp::fold(FoldAdaptor adaptor) {
+  auto input = getInput1();
+  // Element-wise negate(negate(x)) = x
+  if (auto op = input.getDefiningOp<tosa::NegateOp>()) {
+    return op.getInput1();
+  }
+
+  return {};
+}
diff --git a/mlir/test/Dialect/Tosa/canonicalize.mlir b/mlir/test/Dialect/Tosa/canonicalize.mlir
--- a/mlir/test/Dialect/Tosa/canonicalize.mlir
+++ b/mlir/test/Dialect/Tosa/canonicalize.mlir
@@ -525,3 +525,14 @@
   %1 = "tosa.exp"(%0) : (tensor<?x1xf32>) -> tensor<?x1xf32>
   return %1 : tensor<?x1xf32>
 }
+
+// -----
+
+// CHECK-LABEL: @fold_negate_negate
+func.func @fold_negate_negate(%arg0: tensor<?x1xf32>) -> tensor<?x1xf32> {
+  // CHECK: return %arg{{.*}} : tensor<?x1xf32>
+  %0 = "tosa.negate"(%arg0) : (tensor<?x1xf32>) -> tensor<?x1xf32>
+  %1 = "tosa.negate"(%0) : (tensor<?x1xf32>) -> tensor<?x1xf32>
+  return %1 : tensor<?x1xf32>
+}
+