diff --git a/docs/hilbish.txt b/docs/hilbish.txt
index d9763a0..20a9bd7 100644
--- a/docs/hilbish.txt
+++ b/docs/hilbish.txt
@@ -41,7 +41,7 @@ These will be formatted and replaced with the appropriate values.
 `%u` - Name of current user
 `%h` - Hostname of device
 
-read(prompt) -> input? > Read input from the user, using Hilbish's line editor/input reader.
+read(prompt?) -> input? > Read input from the user, using Hilbish's line editor/input reader.
 This is a separate instance from the one Hilbish actually uses.
 Returns `input`, will be nil if ctrl + d is pressed, or an error occurs (which shouldn't happen)