diff -upr mlterm-3.1.0.org/xwindow/x_draw_str.c mlterm-3.1.0.underline/xwindow/x_draw_str.c
--- mlterm-3.1.0.org/xwindow/x_draw_str.c	2012-04-20 09:03:23.000000000 +0900
+++ mlterm-3.1.0.underline/xwindow/x_draw_str.c	2012-05-09 19:20:35.000000000 +0900
@@ -406,11 +406,12 @@ fc_draw_str(
 				}
 				else
 				{
+					const u_int line_height = ((ascent - bottom_margin) >> 4) + 1;
 					x_window_fill_with( window ,
 						x_get_xcolor( color_man , fg_color) ,
-						x , y + ascent ,
+						x , y + height - line_height ,
 						current_width - x ,
-						((ascent - bottom_margin) >> 4) + 1 ) ;
+						line_height ) ;
 				}
 			}
 
@@ -878,11 +879,12 @@ xcore_draw_str(
 				}
 				else
 				{
+					const u_int line_height = ((ascent - bottom_margin) >> 4) + 1;
 					x_window_fill_with( window ,
 						x_get_xcolor( color_man , fg_color) ,
-						x , y + ascent ,
+						x , y + height - line_height ,
 						current_width - x ,
-						((ascent - bottom_margin) >> 4) + 1) ;
+						line_height ) ;
 				}
 			}