diff --git a/docs/src/manual.md b/docs/src/manual.md
index d5c0d195..03dd7a43 100644
--- a/docs/src/manual.md
+++ b/docs/src/manual.md
@@ -88,6 +88,7 @@ You can pass the following keyword arguments to `@benchmark`, `@benchmarkable`,
 - `samples`: The number of samples to take. Execution will end if this many samples have been collected. Defaults to `BenchmarkTools.DEFAULT_PARAMETERS.samples = 10000`.
 - `seconds`: The number of seconds budgeted for the benchmarking process. The trial will terminate if this time is exceeded (regardless of `samples`), but at least one sample will always be taken. In practice, actual runtime can overshoot the budget by the duration of a sample. Defaults to `BenchmarkTools.DEFAULT_PARAMETERS.seconds = 5`.
 - `evals`: The number of evaluations per sample. For best results, this should be kept consistent between trials. A good guess for this value can be automatically set on a benchmark via `tune!`, but using `tune!` can be less consistent than setting `evals` manually (which bypasses tuning). Defaults to `BenchmarkTools.DEFAULT_PARAMETERS.evals = 1`. If the function you study mutates its input, it is probably a good idea to set `evals=1` manually.
+- `evals_set`: If 'true', enforces the globally defined value for evals without tuning. Defaults to `BenchmarkTools.DEFAULT_PARAMETERS.evals_set = false`.
 - `overhead`: The estimated loop overhead per evaluation in nanoseconds, which is automatically subtracted from every sample time measurement. The default value is `BenchmarkTools.DEFAULT_PARAMETERS.overhead = 0`. `BenchmarkTools.estimate_overhead` can be called to determine this value empirically (which can then be set as the default value, if you want).
 - `gctrial`: If `true`, run `gc()` before executing this benchmark's trial. Defaults to `BenchmarkTools.DEFAULT_PARAMETERS.gctrial = true`.
 - `gcsample`: If `true`, run `gc()` before each sample. Defaults to `BenchmarkTools.DEFAULT_PARAMETERS.gcsample = false`.