diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index fdbbf72..7889c2f 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -176,7 +176,7 @@
 
 extern int get_option(char **str, int *pint);
 extern char *get_options(const char *str, int nints, int *ints);
-extern unsigned long long memparse(char *ptr, char **retptr);
+extern unsigned long long memparse(const char *ptr, char **retptr);
 
 extern int core_kernel_text(unsigned long addr);
 extern int __kernel_text_address(unsigned long addr);