Index: kernel/arch/riscv64/src/riscv64.c
===================================================================
--- kernel/arch/riscv64/src/riscv64.c	(revision 219c5302a8e32d74160ae65c1fbfa490273226d9)
+++ kernel/arch/riscv64/src/riscv64.c	(revision e211ea04fccf33d4cb2092f630a29e893e096a02)
@@ -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;