diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 2f69b4471fd..20e20c7b43f 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.80.1"
+channel = "1.81"
 components = [ "rustfmt", "clippy" ]
diff --git a/rust/db_proto/src/gen.rs b/rust/db_proto/src/gen.rs
index 15e4e0cf6c6..3e36aee09dc 100644
--- a/rust/db_proto/src/gen.rs
+++ b/rust/db_proto/src/gen.rs
@@ -827,7 +827,7 @@ mod tests {
                 fixed(fixed_offset = fixed_offset, (0)),
             },
             {
-                name(l), type (crate::meta::Length), size(fixed = fixed),
+                name(l), type ($crate::meta::Length), size(fixed = fixed),
                 value(auto = auto), docs(concat!("`", stringify! (l), "` field.")),
                 fixed(fixed_offset = fixed_offset, ((0) + std::mem::size_of::<u8>())),
             },
@@ -843,7 +843,7 @@ mod tests {
                 fixed(no_fixed_offset = no_fixed_offset, (0)),
             },
             {
-                name(d), type (crate::meta::FixedArray<4, u8>), size(fixed = fixed),
+                name(d), type ($crate::meta::FixedArray<4, u8>), size(fixed = fixed),
                 value(no_value = no_value),
                 docs(concat!("`", stringify! (d), "` field.")),
                 fixed(no_fixed_offset = no_fixed_offset, ((0) + std::mem::size_of::<i16>())),