diff --git a/ChangeLog b/ChangeLog
index 374304b66..9daa4a4c3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2009-07-31  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
+
+	smooth: Fix a data type mismatching with its source.
+
+	* src/smooth/ftgrays.c (gray_render_line): The type
+	of `area' is matched with TWorker.area.
+
 2009-07-31  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
 
 	cache: Disable the legacy compatibility if 16-bit system.
diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c
index afef27e7c..ffe3592b6 100644
--- a/src/smooth/ftgrays.c
+++ b/src/smooth/ftgrays.c
@@ -739,7 +739,7 @@
     {
       TCoord  ex     = TRUNC( ras.x );
       TCoord  two_fx = (TCoord)( ( ras.x - SUBPIXELS( ex ) ) << 1 );
-      TPos    area;
+      TArea   area;
 
 
       first = ONE_PIXEL;