diff --git a/armsrc/em4x50.c b/armsrc/em4x50.c
index bb1eb5f10..b2b9c74f3 100644
--- a/armsrc/em4x50.c
+++ b/armsrc/em4x50.c
@@ -330,7 +330,6 @@ static uint32_t get_pulse_length(void) {
     // to avoid endless loops - quit after EM4X50_SAMPLE_CNT_MAX samples
     
     int sample_cnt = 0;
-    uint8_t sample = 0;
 
     volatile uint8_t sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;