diff --git a/vyper/builtins/interfaces/IERC20Detailed.vyi b/vyper/builtins/interfaces/IERC20Detailed.vyi
index 0be1c6f153..7d20b99fa9 100644
--- a/vyper/builtins/interfaces/IERC20Detailed.vyi
+++ b/vyper/builtins/interfaces/IERC20Detailed.vyi
@@ -16,3 +16,46 @@ def symbol() -> String[1]:
 @external
 def decimals() -> uint8:
     ...
+
+from ethereum.ercs import IERC20
+
+implements: IERC20
+
+# Events
+event Transfer:
+    sender: indexed(address)
+    receiver: indexed(address)
+    value: uint256
+
+event Approval:
+    owner: indexed(address)
+    spender: indexed(address)
+    value: uint256
+
+# Functions
+@view
+@external
+def totalSupply() -> uint256:
+    ...
+
+@view
+@external
+def balanceOf(_owner: address) -> uint256:
+    ...
+
+@view
+@external
+def allowance(_owner: address, _spender: address) -> uint256:
+    ...
+
+@external
+def transfer(_to: address, _value: uint256) -> bool:
+    ...
+
+@external
+def transferFrom(_from: address, _to: address, _value: uint256) -> bool:
+    ...
+
+@external
+def approve(_spender: address, _value: uint256) -> bool:
+    ...