diff --git a/module/system/base/target.scm b/module/system/base/target.scm
index e80bf84e4..8af199537 100644
--- a/module/system/base/target.scm
+++ b/module/system/base/target.scm
@@ -78,6 +78,8 @@
              (endianness big))
             ((string=? "aarch64" cpu)
              (endianness little))
+            ((string-match "riscv[1-9][0-9]*" cpu)
+             (endianness little))
             (else
              (error "unknown CPU endianness" cpu)))))