diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 67f555e1de..fbe81d3039 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -61,13 +61,6 @@ extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 #include <dataflash.h>
 #endif
 
-/*
- * Some systems (for example LWMON) have very short watchdog periods;
- * we must make sure to split long operations like memmove() or
- * crc32() into reasonable chunks.
- */
-#define CHUNKSZ (64 * 1024)
-
 int  gunzip (void *, int, unsigned char *, unsigned long *);
 
 #ifdef CONFIG_BZIP2
diff --git a/include/image.h b/include/image.h
index c9f42980e8..aab3f44ccb 100644
--- a/include/image.h
+++ b/include/image.h
@@ -164,6 +164,13 @@ typedef struct image_header {
 	uint8_t		ih_name[IH_NMLEN];	/* Image Name		*/
 } image_header_t;
 
+/*
+ * Some systems (for example LWMON) have very short watchdog periods;
+ * we must make sure to split long operations like memmove() or
+ * crc32() into reasonable chunks.
+ */
+#define CHUNKSZ (64 * 1024)
+
 #define image_to_cpu(x)		ntohl(x)
 #define cpu_to_image(x)		htonl(x)
 
diff --git a/lib_m68k/m68k_linux.c b/lib_m68k/m68k_linux.c
index 3759fd2d35..f865c0c6a5 100644
--- a/lib_m68k/m68k_linux.c
+++ b/lib_m68k/m68k_linux.c
@@ -37,8 +37,6 @@ DECLARE_GLOBAL_DATA_PTR;
 #define LINUX_MAX_ENVS		256
 #define LINUX_MAX_ARGS		256
 
-#define CHUNKSZ			(64 * 1024)
-
 #ifdef CONFIG_SHOW_BOOT_PROGRESS
 # include <status_led.h>
 # define SHOW_BOOT_PROGRESS(arg)	show_boot_progress(arg)
diff --git a/lib_ppc/ppc_linux.c b/lib_ppc/ppc_linux.c
index 94872a61dc..4e7734ccd3 100644
--- a/lib_ppc/ppc_linux.c
+++ b/lib_ppc/ppc_linux.c
@@ -49,8 +49,6 @@
 #include <asm/cache.h>
 #endif
 
-#define CHUNKSZ (64 * 1024)
-
 DECLARE_GLOBAL_DATA_PTR;
 extern image_header_t header;