diff --git a/pages/advanced-algorithms/available-algorithms/map.mdx b/pages/advanced-algorithms/available-algorithms/map.mdx
index 4ae8f66f6..c5adb3bff 100644
--- a/pages/advanced-algorithms/available-algorithms/map.mdx
+++ b/pages/advanced-algorithms/available-algorithms/map.mdx
@@ -171,7 +171,9 @@ RETURN map.from_pairs([["b", 3], ["c", "c"]]) AS map;
 ### `merge()`
 
 The procedure merges two maps into one. If the same key occurs twice, the later
-value will overwrite the previous one.
+value will overwrite the previous one. 
+
+If null is provided as an argument, it will resolve to an empty map.
 
 <Callout type="info">
 This function is equivalent to **apoc.map.merge**.
@@ -179,8 +181,8 @@ This function is equivalent to **apoc.map.merge**.
 
 {<h4 className="custom-header"> Input: </h4>}
 
-- `first: Map` ➡ A map containing key-value pairs that need to be merged with another map.
-- `second: Map` ➡ The second map containing key-value pairs that need to be merged with the key-values from the first map.
+- `first: mgp.Nullable[Map]` ➡ A map containing key-value pairs that need to be merged with another map.
+- `second: mgp.Nullable[Map]` ➡ The second map containing key-value pairs that need to be merged with the key-values from the first map.
 
 {<h4 className="custom-header"> Output: </h4>}