diff --git a/contracts/erc20/CHANGELOG.json b/contracts/erc20/CHANGELOG.json
index f6d2ec04ca..469b44d988 100644
--- a/contracts/erc20/CHANGELOG.json
+++ b/contracts/erc20/CHANGELOG.json
@@ -9,6 +9,10 @@
             {
                 "note": "Add solidity 0.6 contracts",
                 "pr": 2545
+            },
+            {
+                "note": "Update `LibERC20TokenV06` comments.",
+                "pr": "TODO"
             }
         ]
     },
diff --git a/contracts/erc20/contracts/src/v06/LibERC20TokenV06.sol b/contracts/erc20/contracts/src/v06/LibERC20TokenV06.sol
index 60cee9f6f5..a7a2b4c0a9 100644
--- a/contracts/erc20/contracts/src/v06/LibERC20TokenV06.sol
+++ b/contracts/erc20/contracts/src/v06/LibERC20TokenV06.sol
@@ -27,8 +27,7 @@ library LibERC20TokenV06 {
     bytes constant private DECIMALS_CALL_DATA = hex"313ce567";
 
     /// @dev Calls `IERC20TokenV06(token).approve()`.
-    ///      Reverts if `false` is returned or if the return
-    ///      data length is nonzero and not 32 bytes.
+    ///      Reverts if the result fails `isSuccessfulResult()` or the call reverts.
     /// @param token The address of the token contract.
     /// @param spender The address that receives an allowance.
     /// @param allowance The allowance to set.
@@ -49,8 +48,7 @@ library LibERC20TokenV06 {
 
     /// @dev Calls `IERC20TokenV06(token).approve()` and sets the allowance to the
     ///      maximum if the current approval is not already >= an amount.
-    ///      Reverts if `false` is returned or if the return
-    ///      data length is nonzero and not 32 bytes.
+    ///      Reverts if the result fails `isSuccessfulResult()` or the call reverts.
     /// @param token The address of the token contract.
     /// @param spender The address that receives an allowance.
     /// @param amount The minimum allowance needed.
@@ -67,8 +65,7 @@ library LibERC20TokenV06 {
     }
 
     /// @dev Calls `IERC20TokenV06(token).transfer()`.
-    ///      Reverts if `false` is returned or if the return
-    ///      data length is nonzero and not 32 bytes.
+    ///      Reverts if the result fails `isSuccessfulResult()` or the call reverts.
     /// @param token The address of the token contract.
     /// @param to The address that receives the tokens
     /// @param amount Number of tokens to transfer.
@@ -88,8 +85,7 @@ library LibERC20TokenV06 {
     }
 
     /// @dev Calls `IERC20TokenV06(token).transferFrom()`.
-    ///      Reverts if `false` is returned or if the return
-    ///      data length is nonzero and not 32 bytes.
+    ///      Reverts if the result fails `isSuccessfulResult()` or the call reverts.
     /// @param token The address of the token contract.
     /// @param from The owner of the tokens.
     /// @param to The address that receives the tokens