diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index db104a87d..2d96d00c1 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -2,6 +2,9 @@
 
 ## [Unreleased]
 
+### Fixed
+* Surface FSI evaluation failures to stderr by default in `FsiEvaluator`. Previously, when a code snippet failed during `--eval`, the error was silently discarded unless the caller subscribed to `EvaluationFailed` or provided an `onError` callback. Now a concise error message (file name + stderr output) is always written to stderr, making failures visible in `fsdocs` output.
+
 ### Removed
 * Remove `docs/Dockerfile` (used for mybinder.org Binder integration) and mybinder badge links from documentation pages. The Binder integration relied on a deprecated .NET 7 SDK image and a deprecated `Microsoft.dotnet-interactive` version; mybinder.org support is discontinued.
 * Remove `.ipynb` (Jupyter Notebook) "run in notebook" badge links from all documentation pages and delete `docs/img/badge-notebook.svg`. The links linked to `.ipynb` outputs generated by fsdocs, but .NET Interactive (which powered those notebooks) is deprecated and has no current replacement. The `.ipynb` output format itself is unchanged.
diff --git a/src/FSharp.Formatting.Literate/Evaluator.fs b/src/FSharp.Formatting.Literate/Evaluator.fs
index 6b34f1a65..0b958129c 100644
--- a/src/FSharp.Formatting.Literate/Evaluator.fs
+++ b/src/FSharp.Formatting.Literate/Evaluator.fs
@@ -567,10 +567,27 @@ module __FsiSettings =
                       Exception = e
                       StdErr = e.Result.Error.Merged }
 
-                let msg =
-                    $"Evaluation failed and --strict is on\n    file=%A{file}\n    asExpression=%b{asExpression}, text=%s{text}\n    stdout=%s{e.Result.Output.Merged}\n\    stderr=%s{e.Result.Error.Merged}\n    inner exception=%A{e.InnerException}"
+                // Always surface evaluation failures to stderr so they are visible by default,
+                // even when the caller has not subscribed to EvaluationFailed or provided onError.
+                let fileInfo =
+                    match file with
+                    | Some f -> $" in {f}"
+                    | None -> ""
 
-                onError msg
+                let stderr = e.Result.Error.Merged.Trim()
+
+                let errorMsg =
+                    if stderr <> "" then
+                        $"fsdocs eval: evaluation failure{fileInfo}\n{stderr}"
+                    else
+                        $"fsdocs eval: evaluation failure{fileInfo}\n{e.InnerException}"
+
+                eprintfn "%s" errorMsg
+
+                let strictMsg =
+                    $"Evaluation failed\n    file=%A{file}\n    asExpression=%b{asExpression}, text=%s{text}\n    stdout=%s{e.Result.Output.Merged}\n    stderr=%s{e.Result.Error.Merged}\n    inner exception=%A{e.InnerException}"
+
+                onError strictMsg
 
                 { Output = None
                   FsiOutput = None