Index: kernel/arch/riscv64/src/riscv64.c
===================================================================
--- kernel/arch/riscv64/src/riscv64.c	(revision 295ee02c50e19fcbbd3b498a7dca063487ab02c9)
+++ kernel/arch/riscv64/src/riscv64.c	(revision a53ed3a8097360ccf174e8d94fb407db919eb66a)
@@ -143,10 +143,10 @@
 }
 
-int memcpy_from_uspace(void *dst, const void *uspace_src, size_t size)
+errno_t memcpy_from_uspace(void *dst, const void *uspace_src, size_t size)
 {
 	return EOK;
 }
 
-int memcpy_to_uspace(void *uspace_dst, const void *src, size_t size)
+errno_t memcpy_to_uspace(void *uspace_dst, const void *src, size_t size)
 {
 	return EOK;