diff --git a/book/src/language-tour/assert.md b/book/src/language-tour/assert.md
index 72e71fc2..ed29ab04 100644
--- a/book/src/language-tour/assert.md
+++ b/book/src/language-tour/assert.md
@@ -7,4 +7,10 @@ assert rawdata = SomeType
 Causes the script to fail if the rawdata doesn't match the structure of datumtype
 Otherwise, returns a value of SomeType
 
-Primarily for validating input datums / redeemers.
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+Primarily for validating input datums / redeemers.
+
+You can unpack (1-match) data in the assertion
+
+```gleam
+assert Some(x) = Option(Int)
+```
\ No newline at end of file