diff --git a/ethers-core/src/abi/tokens.rs b/ethers-core/src/abi/tokens.rs
index 40221511..3257f3dd 100644
--- a/ethers-core/src/abi/tokens.rs
+++ b/ethers-core/src/abi/tokens.rs
@@ -463,6 +463,7 @@ impl_fixed_types!(13);
 impl_fixed_types!(14);
 impl_fixed_types!(15);
 impl_fixed_types!(16);
+impl_fixed_types!(18);
 impl_fixed_types!(32);
 impl_fixed_types!(64);
 impl_fixed_types!(128);