diff --git a/capsules/src/virtual_spi.rs b/capsules/src/virtual_spi.rs
index 949b1a5..076bb39 100644
--- a/capsules/src/virtual_spi.rs
+++ b/capsules/src/virtual_spi.rs
@@ -189,6 +189,14 @@
     fn get_rate(&self) -> u32 {
         self.mux.spi.get_rate()
     }
+
+    fn hold_low(&self) {
+        self.mux.spi.hold_low();
+    }
+
+    fn release_low(&self) {
+        self.mux.spi.release_low();
+    }
 }
 
 pub struct VirtualSpiSlaveDevice<'a, Spi: hil::spi::SpiSlave> {
diff --git a/kernel/src/hil/spi.rs b/kernel/src/hil/spi.rs
index 0ef47e8..23b5165 100644
--- a/kernel/src/hil/spi.rs
+++ b/kernel/src/hil/spi.rs
@@ -149,6 +149,9 @@
     fn get_polarity(&self) -> ClockPolarity;
     fn get_phase(&self) -> ClockPhase;
     fn get_rate(&self) -> u32;
+
+    fn hold_low(&self);
+    fn release_low(&self);
 }
 
 pub trait SpiSlaveClient {