diff --git a/net-p2p/openethereum/files/patch-cargo-crates_logos-derive-0.7.7_src_lib.rs b/net-p2p/openethereum/files/patch-cargo-crates_logos-derive-0.7.7_src_lib.rs
new file mode 100644
index 000000000000..e522c239ff92
--- /dev/null
+++ b/net-p2p/openethereum/files/patch-cargo-crates_logos-derive-0.7.7_src_lib.rs
@@ -0,0 +1,34 @@
+error[E0061]: this function takes 1 argument but 2 arguments were supplied
+   --> cargo-crates/logos-derive-0.7.7/src/lib.rs:55:20
+    |
+55  |             extras.insert(util::ident(&ext), |_| panic!("Only one #[extras] attribute can be declared."));
+    |                    ^^^^^^ -----------------  ----------------------------------------------------------- supplied 2 arguments
+    |                    |
+    |                    expected 1 argument
+    |
+
+--- cargo-crates/logos-derive-0.7.7/src/lib.rs.orig	2021-06-19 19:31:53 UTC
++++ cargo-crates/logos-derive-0.7.7/src/lib.rs
+@@ -52,7 +52,7 @@ pub fn logos(input: TokenStream) -> TokenStream {
+ 
+     for attr in &item.attrs {
+         if let Some(ext) = value_from_attr("extras", attr) {
+-            extras.insert(util::ident(&ext), |_| panic!("Only one #[extras] attribute can be declared."));
++            extras.insert_or(util::ident(&ext), |_| panic!("Only one #[extras] attribute can be declared."));
+         }
+     }
+ 
+@@ -86,11 +86,11 @@ pub fn logos(input: TokenStream) -> TokenStream {
+             let variant = &variant.ident;
+ 
+             if ident == "error" {
+-                error.insert(variant, |_| panic!("Only one #[error] variant can be declared."));
++                error.insert_or(variant, |_| panic!("Only one #[error] variant can be declared."));
+             }
+ 
+             if ident == "end" {
+-                end.insert(variant, |_| panic!("Only one #[end] variant can be declared."));
++                end.insert_or(variant, |_| panic!("Only one #[end] variant can be declared."));
+             }
+ 
+             if let Some(path) = value_from_attr("token", attr) {
diff --git a/net-p2p/openethereum/files/patch-cargo-crates_logos-derive-0.7.7_src_util.rs b/net-p2p/openethereum/files/patch-cargo-crates_logos-derive-0.7.7_src_util.rs
new file mode 100644
index 000000000000..b39df6a643c5
--- /dev/null
+++ b/net-p2p/openethereum/files/patch-cargo-crates_logos-derive-0.7.7_src_util.rs
@@ -0,0 +1,16 @@
+--- cargo-crates/logos-derive-0.7.7/src/util.rs.orig	2021-06-19 20:26:00 UTC
++++ cargo-crates/logos-derive-0.7.7/src/util.rs
+@@ -3,11 +3,11 @@ pub use proc_macro2::{Span, TokenTree};
+ use quote::quote;
+ 
+ pub trait OptionExt<T> {
+-    fn insert(&mut self, val: T, f: impl FnOnce(&T));
++    fn insert_or(&mut self, val: T, f: impl FnOnce(&T));
+ }
+ 
+ impl<T> OptionExt<T> for Option<T> {
+-    fn insert(&mut self, val: T, f: impl FnOnce(&T)) {
++    fn insert_or(&mut self, val: T, f: impl FnOnce(&T)) {
+         match self {
+             Some(t) => f(t),
+             slot    => *slot = Some(val),