diff --git a/libboard_zynq/src/flash/mod.rs b/libboard_zynq/src/flash/mod.rs
index 3a39c0e..9d24b71 100644
--- a/libboard_zynq/src/flash/mod.rs
+++ b/libboard_zynq/src/flash/mod.rs
@@ -328,7 +328,7 @@ impl Flash<()> {
             .mode_bits(0xFF)
             // 2 devices
             .two_mem(true)
-            .u_page(false)
+            .u_page(chip_index != 0)
             // Quad SPI mode
             .lq_mode(false)
         );