diff --git a/sw/airborne/booz/arch/stm32/peripherals/booz_sc18is600_arch.c b/sw/airborne/booz/arch/stm32/peripherals/booz_sc18is600_arch.c
index 6532bf93ea..38ed832520 100644
--- a/sw/airborne/booz/arch/stm32/peripherals/booz_sc18is600_arch.c
+++ b/sw/airborne/booz/arch/stm32/peripherals/booz_sc18is600_arch.c
@@ -84,7 +84,7 @@ void sc18is600_arch_init(void) {
   SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;				
   SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;				
   SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;				
-  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;	
+  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;	
   SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;			
   SPI_InitStructure.SPI_CRCPolynomial = 7;				
   SPI_Init(SPI2, &SPI_InitStructure);