diff --git a/artiq/firmware/libboard_artiq/hmc830_7043.rs b/artiq/firmware/libboard_artiq/hmc830_7043.rs
index 0eb7f3ad1..b1d1cb3b9 100644
--- a/artiq/firmware/libboard_artiq/hmc830_7043.rs
+++ b/artiq/firmware/libboard_artiq/hmc830_7043.rs
@@ -131,6 +131,8 @@ mod hmc830 {
         write(0x4, m_div);
         write(0x3, n_div);
 
+        clock::spin_us(10_000);
+
         info!("  ...done");
     }