diff --git a/libraries/I2S/src/I2S.cpp b/libraries/I2S/src/I2S.cpp
index a62bc5114..8b0cc3979 100644
--- a/libraries/I2S/src/I2S.cpp
+++ b/libraries/I2S/src/I2S.cpp
@@ -422,6 +422,7 @@ void I2SClass::enableClock(int divider)
   GCLK->GENCTRL.bit.ID = _clockGenerator;
   GCLK->GENCTRL.bit.SRC = src;
   GCLK->GENCTRL.bit.IDC = 1;
+  GCLK->GENCTRL.bit.DIVSEL = 0;
   GCLK->GENCTRL.bit.GENEN = 1;
 
   // enable