diff --git a/include/common.h b/include/common.h
index 409515f..8ca67f6 100644
--- a/include/common.h
+++ b/include/common.h
@@ -923,7 +923,7 @@
 {
 }
 
-static inline phys_addr_t map_to_sysmem(void *ptr)
+static inline phys_addr_t map_to_sysmem(const void *ptr)
 {
 	return (phys_addr_t)(uintptr_t)ptr;
 }