diff --git a/libgloss/riscv/semihost_syscall.h b/libgloss/riscv/semihost_syscall.h
index 50e731b40..6c054a73a 100644
--- a/libgloss/riscv/semihost_syscall.h
+++ b/libgloss/riscv/semihost_syscall.h
@@ -19,6 +19,8 @@ __semihost_syscall (long id, long *data_block)
     ".balign 16             \n"
     ".option push           \n"
     ".option norvc          \n"
+    ".option arch,-c        \n"
+    ".option arch,-zcmt,-zcmp,-zcd,-zcf,-zcb,-zca \n"
     "slli zero, zero, 0x1f  \n"
     "ebreak                 \n"
     "srai zero, zero, 0x7   \n"