diff --git a/module/system/base/target.scm b/module/system/base/target.scm
index fbead44aa..105c581b5 100644
--- a/module/system/base/target.scm
+++ b/module/system/base/target.scm
@@ -80,6 +80,8 @@
              (endianness big))
             ((string=? "aarch64" cpu)
              (endianness little))
+            ((string-match "riscv[1-9][0-9]*" cpu)
+             (endianness little))
             (else
              (error "unknown CPU endianness" cpu)))))