Index: uspace/lib/c/arch/riscv64/src/stacktrace.c
===================================================================
--- uspace/lib/c/arch/riscv64/src/stacktrace.c	(revision c09ff7bd1b88585eb4f2aaba5b1a2d603a5979c7)
+++ uspace/lib/c/arch/riscv64/src/stacktrace.c	(revision da9d6cae9d1c35542e015f3d2826946a83fef587)
@@ -39,10 +39,10 @@
 }
 
-int stacktrace_fp_prev(stacktrace_t *st, uintptr_t fp, uintptr_t *prev)
+errno_t stacktrace_fp_prev(stacktrace_t *st, uintptr_t fp, uintptr_t *prev)
 {
 	return 0;
 }
 
-int stacktrace_ra_get(stacktrace_t *st, uintptr_t fp, uintptr_t *ra)
+errno_t stacktrace_ra_get(stacktrace_t *st, uintptr_t fp, uintptr_t *ra)
 {
 	return 0;