diff --git a/spec/API_specification/data_type_functions.md b/spec/API_specification/data_type_functions.md
index 0b76b386b..5a8165411 100644
--- a/spec/API_specification/data_type_functions.md
+++ b/spec/API_specification/data_type_functions.md
@@ -95,6 +95,8 @@ Machine limits for floating-point data types.
             -   largest representable number.
         -   **min**: _float_
             -   smallest representable number.
+        -   **smallest_normal**: _float_
+            -   smallest positive floating-point number with full precision.
 
 (function-iinfo)=
 ### iinfo(type, /)