diff --git a/mods/CORE/flowlib/API.md b/mods/CORE/flowlib/API.md
index 0542e4519..f3282c975 100644
--- a/mods/CORE/flowlib/API.md
+++ b/mods/CORE/flowlib/API.md
@@ -37,4 +37,8 @@ Return direction where the water is flowing (to be use to push mobs, items...).
 * pos: position
 * node: node
 
-## flowlib.move_centre(pos, realpos, node, radius)
\ No newline at end of file
+## flowlib.move_centre(pos, realpos, node, radius)
+* pos: position
+* realpos: position
+* node: node
+* radius: number
\ No newline at end of file