diff --git a/libraries/MySensors/utility/SPIFlash.cpp b/libraries/MySensors/utility/SPIFlash.cpp
index 03d6a1a..ee6e1b0 100644
--- a/libraries/MySensors/utility/SPIFlash.cpp
+++ b/libraries/MySensors/utility/SPIFlash.cpp
@@ -56,6 +56,7 @@ void SPIFlash::unselect() {
 /// setup SPI, read device ID etc...
 boolean SPIFlash::initialize()
 {
+  SPI.begin();
   _SPCR = SPCR;
   _SPSR = SPSR;
   pinMode(_slaveSelectPin, OUTPUT);