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-rw-r--r--doc/lua_api.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index 7663b5c9e..35be95d51 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -1481,7 +1481,8 @@ Usage
-----
Groups are stored in a table, having the group names with keys and the
-group ratings as values. For example:
+group ratings as values. Group ratings are integer values within the
+range [-32767, 32767]. For example:
-- Default dirt
groups = {crumbly=3, soil=1}