diff --git a/ChangeLog b/ChangeLog
index ce0f2c9c3..e24424e64 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2009-07-03  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
+
+	truetype: Cast the project vector to 32-bit for LP64 system.
+
+	* src/truetype/ttinterp.c (Project, DualProject):
+	Insert casts from FT_Pos (the arguments `dx', `dy')
+	to FT_UInt32 (the argument to TT_DotFix14()).
+
 2009-07-03  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
 
 	truetype: Cast the scaling params to 32-bit for LP64 system.
diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c
index a3346ce68..3904c43cc 100644
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -2194,7 +2194,7 @@
     FT_ASSERT( !CUR.face->unpatented_hinting );
 #endif
 
-    return TT_DotFix14( dx, dy,
+    return TT_DotFix14( (FT_UInt32)dx, (FT_UInt32)dy,
                         CUR.GS.projVector.x,
                         CUR.GS.projVector.y );
   }
@@ -2220,7 +2220,7 @@
   Dual_Project( EXEC_OP_ FT_Pos  dx,
                          FT_Pos  dy )
   {
-    return TT_DotFix14( dx, dy,
+    return TT_DotFix14( (FT_UInt32)dx, (FT_UInt32)dy,
                         CUR.GS.dualVector.x,
                         CUR.GS.dualVector.y );
   }