diff --git a/src/ParamOutputImpl/Plot/AxisLegend.hh b/src/ParamOutputImpl/Plot/AxisLegend.hh
index 15a5378..92d1658 100644
--- a/src/ParamOutputImpl/Plot/AxisLegend.hh
+++ b/src/ParamOutputImpl/Plot/AxisLegend.hh
@@ -110,6 +110,7 @@ public:
 				result += Label::DELIMITER;
 			}
 			result += label._text;
+			isFirstLabel = true;
 		}
 		return result;
 	}
--
libgit2 0.21.2