diff --git a/doc/dwarfs.md b/doc/dwarfs.md
index 1903273b..37f1bc20 100644
--- a/doc/dwarfs.md
+++ b/doc/dwarfs.md
@@ -153,7 +153,7 @@ options:
   be an integer value. Suffixes `ms`, `s`, `m`, `h` are supported.
   If no suffix is given, the value will be assumed to be in seconds.
 
-- `-o perfmon=`*name*:
+- `-o perfmon=`*name*[`+`*name*...]:
   Enable performance monitoring for the list of `+`-separated components.
   This option is only available if the project was built with performance
   monitoring enabled. Available components include `fuse`, `filesystem_v2`,
diff --git a/doc/dwarfsextract.md b/doc/dwarfsextract.md
index 7603d385..a0566946 100644
--- a/doc/dwarfsextract.md
+++ b/doc/dwarfsextract.md
@@ -90,7 +90,7 @@ to disk:
   Enable logging context regardless of level. By default, context is enabled
   if the level is `verbose`, `debug` or `trace`.
 
-- `--perfmon=`*name*:
+- `--perfmon=`*name*[`,`*name*...]:
   Enable performance monitoring for the list of comma-separated components.
   This option is only available if the project was built with performance
   monitoring enabled. Available components include `fuse`, `filesystem_v2`,