diff --git a/src/si5153.rs b/src/si5153.rs
index 5a98dd3..6d23f24 100644
--- a/src/si5153.rs
+++ b/src/si5153.rs
@@ -152,6 +152,15 @@ where
 
     pub fn set_ms_phase(&mut self, i2c: &mut I2C, synth: Multisynth, phase: u8) {
         self.write_byte_reg(i2c, synth.phoff_address(), phase);
+
+        match self.ms_srcs[synth as usize] {
+            PLL::A => {
+                self.write_byte_reg(i2c, PLL_RESET, 1 << 5);
+            }
+            PLL::B => {
+                self.write_byte_reg(i2c, PLL_RESET, 1 << 7);
+            }
+        }
     }
 
     pub fn pll_reset(&mut self, i2c: &mut I2C) {