diff --git a/mlir/include/mlir/Dialect/StandardOps/IR/Ops.td b/mlir/include/mlir/Dialect/StandardOps/IR/Ops.td
--- a/mlir/include/mlir/Dialect/StandardOps/IR/Ops.td
+++ b/mlir/include/mlir/Dialect/StandardOps/IR/Ops.td
@@ -1348,7 +1348,7 @@
     Syntax:
 
     ```
-    operation ::= ssa-id `=` `std.copysign` ssa-use `:` type
+    operation ::= ssa-id `=` `std.copysign` ssa-use `,` ssa-use `:` type
     ```
 
     The `copysign` returns a value with the magnitude of the first operand and
@@ -1361,13 +1361,13 @@
 
     ```mlir
     // Scalar copysign value.
-    %a = copysign %b %c : f64
+    %a = copysign %b, %c : f64
 
     // SIMD vector element-wise copysign value.
-    %f = copysign %g %h : vector<4xf32>
+    %f = copysign %g, %h : vector<4xf32>
 
     // Tensor element-wise copysign value.
-    %x = copysign %y %z : tensor<4x?xf8>
+    %x = copysign %y, %z : tensor<4x?xf8>
     ```
   }];
 }