diff --git a/docs/source/reference/abstract_chart.md b/docs/source/reference/abstract_chart.md
index ada4a308..a40f7a54 100644
--- a/docs/source/reference/abstract_chart.md
+++ b/docs/source/reference/abstract_chart.md
@@ -89,7 +89,7 @@ ___
 
 
 
-```{py:method} trend_line(start_time: str | datetime, start_value: NUM, end_time: str | datetime, end_value: NUM, color: COLOR, width: int, style: LINE_STYLE, round: bool) -> Line
+```{py:method} trend_line(start_time: str | datetime, start_value: NUM, end_time: str | datetime, end_value: NUM, line_color: COLOR, width: int, style: LINE_STYLE, round: bool) -> Line
 
 Creates a trend line, drawn from the first point (`start_time`, `start_value`) to the last point (`end_time`, `end_value`).