diff --git a/Ground-Types.md b/Ground-Types.md
index 039551e..e29b25b 100644
--- a/Ground-Types.md
+++ b/Ground-Types.md
@@ -18,6 +18,8 @@ Example: `'a'`, `' '` (space)
 
 Example: `[2, -4, -1.5, "Hi!"]`
 
+- function: This stores a function. See [Functions](Ground-Functions) for more information.
+
 ## Argument Types
 
 Ground has _ different argument types, which are each used for different arguments in various commands.