diff --git a/tool/run/depot.inc b/tool/run/depot.inc
index b72010f974..35cdf162b5 100644
--- a/tool/run/depot.inc
+++ b/tool/run/depot.inc
@@ -24,6 +24,10 @@ proc depot_spec { } {
 	if {[have_spec arm_v6]}  { return "arm_v6" }
 	if {[have_spec arm_v7a]} { return "arm_v7a" }
 	if {[have_spec arm_v8a]} { return "arm_v8a" }
+	if {[have_spec riscv]}   { return "riscv" }
+
+	puts stderr "Error: unsupported architecture"
+	exit 1
 }