Index: generic/include/syscall/copy.h
===================================================================
--- generic/include/syscall/copy.h	(revision e3c762cdcb8d0aafcf71fd9b78017dd48ac328e2)
+++ generic/include/syscall/copy.h	(revision f58af46f91b507488f711011ceb5691c4a7358d3)
@@ -38,12 +38,12 @@
 extern char memcpy_to_uspace_failover_address;
 
-extern int copy_from_uspace(void *dst, void *uspace_src, size_t size);
-extern int copy_to_uspace(void *dst_uspace, void *src, size_t size);
+extern int copy_from_uspace(void *dst, const void *uspace_src, size_t size);
+extern int copy_to_uspace(void *dst_uspace, const void *src, size_t size);
 
 /*
  * This interface must be implemented by each architecture.
  */
-extern int memcpy_from_uspace(void *dst, void *uspace_src, size_t size);
-extern int memcpy_to_uspace(void *uspace_dst, void *src, size_t size);
+extern int memcpy_from_uspace(void *dst, const void *uspace_src, size_t size);
+extern int memcpy_to_uspace(void *uspace_dst, const void *src, size_t size);
 
 #endif