diff --git a/src/graph_gui.cpp b/src/graph_gui.cpp
index c43743952a..7cb36d9dbe 100644
--- a/src/graph_gui.cpp
+++ b/src/graph_gui.cpp
@@ -445,7 +445,7 @@ protected:
 		x = rtl ? r.right : r.left;
 		y = r.bottom + ScaleGUITrad(2);
 
-		// if there are not enough datapoints to fill the graph, align to the right
+		/* if there are not enough datapoints to fill the graph, align to the right */
 		x += (this->num_vert_lines - this->num_on_x_axis) * x_sep;
 
 		/* Draw x-axis labels and markings for graphs based on financial quarters and years.  */
@@ -513,7 +513,7 @@ protected:
 				x = r.left + (x_sep / 2);
 			}
 
-			// if there are not enough datapoints to fill the graph, align to the right
+			/* if there are not enough datapoints to fill the graph, align to the right */
 			x += (this->num_vert_lines - this->num_on_x_axis) * x_sep;
 
 			uint prev_x = INVALID_DATAPOINT_POS;