diff --git a/rtengine/dcraw.c b/rtengine/dcraw.c
index 737d1989c..2624da976 100644
--- a/rtengine/dcraw.c
+++ b/rtengine/dcraw.c
@@ -19,8 +19,8 @@
    *If you have not modified dcraw.c in any way, a link to my
    homepage qualifies as "full source code".
 
-   $Revision: 1.451 $
-   $Date: 2012/07/05 04:33:11 $
+   $Revision: 1.452 $
+   $Date: 2012/07/23 04:28:00 $
  */
 
 #define DCRAW_VERSION "9.16"
@@ -6355,7 +6355,7 @@ void CLASS adobe_coeff (const char *make, const char *model)
 	{ 6264,-582,-724,-8312,15948,2504,-1744,1919,8664 } },
     { "Canon EOS-1DS", 0, 0xe20,
 	{ 4374,3631,-1743,-7520,15212,2472,-2892,3632,8161 } },
-    { "Canon EOS-1D X", 0, 0,
+    { "Canon EOS-1D X", 0, 0x3c4e,
 	{ 6847,-614,-1014,-4669,12737,2139,-1197,2488,6846 } },
     { "Canon EOS-1D", 0, 0xe20,
 	{ 6806,-179,-1020,-8097,16415,1687,-3267,4236,7690 } },
diff --git a/rtengine/dcraw.cc b/rtengine/dcraw.cc
index 60e1d96ec..a6379a4a5 100644
--- a/rtengine/dcraw.cc
+++ b/rtengine/dcraw.cc
@@ -31,8 +31,8 @@
    *If you have not modified dcraw.c in any way, a link to my
    homepage qualifies as "full source code".
 
-   $Revision: 1.451 $
-   $Date: 2012/07/05 04:33:11 $
+   $Revision: 1.452 $
+   $Date: 2012/07/23 04:28:00 $
  */
 
 #define DCRAW_VERSION "9.16"
@@ -5964,7 +5964,7 @@ void CLASS adobe_coeff (const char *make, const char *model)
 	{ 6264,-582,-724,-8312,15948,2504,-1744,1919,8664 } },
     { "Canon EOS-1DS", 0, 0xe20,
 	{ 4374,3631,-1743,-7520,15212,2472,-2892,3632,8161 } },
-    { "Canon EOS-1D X", 0, 0,
+    { "Canon EOS-1D X", 0, 0x3c4e,
 	{ 6847,-614,-1014,-4669,12737,2139,-1197,2488,6846 } },
     { "Canon EOS-1D", 0, 0xe20,
 	{ 6806,-179,-1020,-8097,16415,1687,-3267,4236,7690 } },
diff --git a/rtengine/dcraw.patch b/rtengine/dcraw.patch
index a10690d98..bfef0fcfa 100644
--- a/rtengine/dcraw.patch
+++ b/rtengine/dcraw.patch
@@ -1,5 +1,5 @@
---- C:/GCC/RT/RTSrc/rtengine/dcraw.c	Sun Jul 08 22:42:31 2012
-+++ C:/GCC/RT/RTSrc/rtengine/dcraw.cc	Sun Jul 08 22:53:12 2012
+--- C:/GCC/RT/RTSrc/rtengine/dcraw.c	Mon Aug 13 19:33:25 2012
++++ C:/GCC/RT/RTSrc/rtengine/dcraw.cc	Mon Aug 13 19:45:38 2012
 @@ -1,5 +1,17 @@
 +/*RT*/#include <glib.h>
 +/*RT*/#include <glib/gstdio.h>