diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index b4f5b81..f592df7 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -226,7 +226,7 @@
 				int prefix_type, int rowsize, int groupsize,
 				const void *buf, size_t len, bool ascii);
 extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
-			void *buf, size_t len);
+			const void *buf, size_t len);
 #define hex_asc(x)	"0123456789abcdef"[x]
 
 #ifdef DEBUG
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 16f2e29..bd5edae 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -189,7 +189,7 @@
  * rowsize of 16, groupsize of 1, and ASCII output included.
  */
 void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
-			void *buf, size_t len)
+			const void *buf, size_t len)
 {
 	print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1,
 			buf, len, 1);