diff --git a/docs/charts.md b/docs/charts.md
index 096e2e4ff303ee641230d7a0d4927ab34c58787c..be69597fb2a8c352dbd241204fab06e7d335092e 100644
--- a/docs/charts.md
+++ b/docs/charts.md
@@ -555,6 +555,8 @@ _downward_ (to the subchart's subcharts), but not _upward_ to the parent
 chart. There is no way for a subchart to influence the values of the
 parent chart.
 
+Also, global variables of parent charts take precedence over the global variables from subcharts.
+
 _Global sections are restricted to only simple key/value pairs. They do
 not support nesting._