diff --git a/hw/riscv/sifive_test.c b/hw/riscv/sifive_test.c
index 339195c..1d57a15 100644
--- a/hw/riscv/sifive_test.c
+++ b/hw/riscv/sifive_test.c
@@ -58,7 +58,7 @@
     .write = sifive_test_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
-        .min_access_size = 4,
+        .min_access_size = 2,
         .max_access_size = 4
     }
 };