diff --git a/ChangeLog b/ChangeLog
index 54ec7cb..ff26ffc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,8 @@
         * src/rgbfilt/ftrgbgen.h, src/rgbfilt/ftrgbgn2.h: fix some computation
         issues on 16-bit platforms.
 
+        * src/rgbfilt/ftrgb.c: fixed computation bug for vertical modes
+
 2005-09-27  David Turner  <david@freetype.org>
 
         * include/freetype/config/ftheader.h, include/freetype/ftrgb.h,
diff --git a/src/rgbfilt/ftrgb.c b/src/rgbfilt/ftrgb.c
index afa8dbb..9b44551 100644
--- a/src/rgbfilt/ftrgb.c
+++ b/src/rgbfilt/ftrgb.c
@@ -25,10 +25,10 @@
 /* these values come from libXft */
 static const FT_RgbFilterRec  ft_rgbfilter_default =
 {
-  { 65538*9/13, 65538*3/13, 65538*1/13,
-    65538*1/6,  65538*4/6,  65538*1/6,
+  { 65538*9/13, 65538*3/13, 65538*1/13,
+    65538*1/6,  65538*4/6,  65538*1/6,
     65538*1/13, 65538*3/13, 65538*9/13 },
-  NULL
+  NULL
 };
 
 static void
@@ -60,9 +60,9 @@
 {
 #define  HMUL   1
 #define  VMUL   3
-#define  OFF_R  0
-#define  OFF_G  1
-#define  OFF_B  2
+#define  OFF_R  (0*in_pitch)
+#define  OFF_G  (1*in_pitch)
+#define  OFF_B  (2*in_pitch)
 #include "ftrgbgen.h"
 }
 
@@ -72,9 +72,9 @@
 {
 #define  HMUL   1
 #define  VMUL   3
-#define  OFF_R  2
-#define  OFF_G  1
-#define  OFF_B  0
+#define  OFF_R  (2*in_pitch)
+#define  OFF_G  (1*in_pitch)
+#define  OFF_B  (0*in_pitch)
 #include "ftrgbgen.h"
 }
 
@@ -109,9 +109,9 @@
 {
 #define  HMUL   1
 #define  VMUL   3
-#define  OFF_R  0
-#define  OFF_G  1
-#define  OFF_B  2
+#define  OFF_R  (0*in_pitch)
+#define  OFF_G  (1*in_pitch)
+#define  OFF_B  (2*in_pitch)
 #include "ftrgbgn2.h"
 }
 
@@ -121,9 +121,9 @@
 {
 #define  HMUL   1
 #define  VMUL   3
-#define  OFF_R  2
-#define  OFF_G  1
-#define  OFF_B  0
+#define  OFF_R  (2*in_pitch)
+#define  OFF_G  (1*in_pitch)
+#define  OFF_B  (0*in_pitch)
 #include "ftrgbgn2.h"
 }