diff --git a/.wiki/Kernel-documentation.md b/.wiki/Kernel-documentation.md
index 4aabb9f..69ec712 100644
--- a/.wiki/Kernel-documentation.md
+++ b/.wiki/Kernel-documentation.md
@@ -68,6 +68,13 @@ More information can be found on the limine project's [GitHub](https://github.co
 
 ## mm
 
+### memory_map.h
+
+#### `memory_map_get_total_memory_size(boot_info*)` - function (uint64_t)
+Calculates the total amount of memory available, by iterating over the memory map.
+The size is stored in a static variable, so no matter how often you call this function, the size will only be calculated once.
+It returns the total amount of memory in bytes.
+
 ### page_frame.h
 This header provides the functions for basic interactions with pages (in the physical memory space).