X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/e21b620bf6cc9fb1bb9e516efb57b1cb12c00085..58e42c6ca92c4e6181967f83e40d9dea1ea48259:/LUFA/Drivers/Peripheral/SPI.h

diff --git a/LUFA/Drivers/Peripheral/SPI.h b/LUFA/Drivers/Peripheral/SPI.h
index d8d60ede5..66cdaf513 100644
--- a/LUFA/Drivers/Peripheral/SPI.h
+++ b/LUFA/Drivers/Peripheral/SPI.h
@@ -102,7 +102,9 @@
 				          (PrescalerMask & ~SPI_USE_DOUBLESPEED));
 				
 				if (PrescalerMask & SPI_USE_DOUBLESPEED)
-				  SPSR = (1 << SPI2X);
+				  SPSR |= (1 << SPI2X);
+				else
+				  SPSR &= ~(1 << SPI2X);
 			}
 			
 			/** Sends and receives a byte through the SPI interface, blocking until the transfer is complete.