diff --git a/Cargo.toml b/Cargo.toml
index 23f3609..9fadb0a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "thiserror"
-version = "1.0.68"
+version = "1.0.69"
 authors = ["David Tolnay <dtolnay@gmail.com>"]
 categories = ["rust-patterns"]
 description = "derive(Error)"
@@ -12,7 +12,7 @@ repository = "https://github.com/dtolnay/thiserror"
 rust-version = "1.61"
 
 [dependencies]
-thiserror-impl = { version = "=1.0.68", path = "impl" }
+thiserror-impl = { version = "=1.0.69", path = "impl" }
 
 [dev-dependencies]
 anyhow = "1.0.73"
diff --git a/impl/Cargo.toml b/impl/Cargo.toml
index 933831e..9936021 100644
--- a/impl/Cargo.toml
+++ b/impl/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "thiserror-impl"
-version = "1.0.68"
+version = "1.0.69"
 authors = ["David Tolnay <dtolnay@gmail.com>"]
 description = "Implementation detail of the `thiserror` crate"
 edition = "2021"
diff --git a/impl/src/fmt.rs b/impl/src/fmt.rs
index 3d1394c..d2ab353 100644
--- a/impl/src/fmt.rs
+++ b/impl/src/fmt.rs
@@ -193,6 +193,8 @@ fn fallback_explicit_named_args(input: ParseStream) -> Result<FmtArguments> {
             let ident = input.call(Ident::parse_any)?;
             input.parse::<Token![=]>()?;
             args.named.insert(ident);
+        } else {
+            input.parse::<TokenTree>()?;
         }
     }
 
diff --git a/src/lib.rs b/src/lib.rs
index 30715fe..92662f4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -258,7 +258,7 @@
 //!
 //!   [`anyhow`]: https://github.com/dtolnay/anyhow
 
-#![doc(html_root_url = "https://docs.rs/thiserror/1.0.68")]
+#![doc(html_root_url = "https://docs.rs/thiserror/1.0.69")]
 #![allow(
     clippy::module_name_repetitions,
     clippy::needless_lifetimes,
diff --git a/tests/ui/expression-fallback.rs b/tests/ui/expression-fallback.rs
new file mode 100644
index 0000000..7269129
--- /dev/null
+++ b/tests/ui/expression-fallback.rs
@@ -0,0 +1,7 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+#[error("".yellow)]
+pub struct ArgError;
+
+fn main() {}
diff --git a/tests/ui/expression-fallback.stderr b/tests/ui/expression-fallback.stderr
new file mode 100644
index 0000000..5c9f215
--- /dev/null
+++ b/tests/ui/expression-fallback.stderr
@@ -0,0 +1,19 @@
+error: expected `,`, found `.`
+ --> tests/ui/expression-fallback.rs:4:11
+  |
+4 | #[error("".yellow)]
+  |           ^ expected `,`
+
+error: argument never used
+ --> tests/ui/expression-fallback.rs:4:12
+  |
+4 | #[error("".yellow)]
+  |         -- ^^^^^^ argument never used
+  |         |
+  |         formatting specifier missing
+
+error[E0425]: cannot find value `yellow` in this scope
+ --> tests/ui/expression-fallback.rs:4:12
+  |
+4 | #[error("".yellow)]
+  |            ^^^^^^ not found in this scope