diff --git a/tmk_core/protocol/arm_atsam/adc.c b/tmk_core/protocol/arm_atsam/adc.c
index ab77f9240..cb5c349b7 100644
--- a/tmk_core/protocol/arm_atsam/adc.c
+++ b/tmk_core/protocol/arm_atsam/adc.c
@@ -74,9 +74,9 @@ void ADC0_init(void)
     while (ADC0->SYNCBUSY.bit.SAMPCTRL) { DBGC(DC_ADC0_SAMPCTRL_SYNCING_1); }
 
     //Load factory calibration data
-    ADC0->CALIB.bit.BIASCOMP = (ADC0_FUSES_BIASCOMP_ADDR >> ADC0_FUSES_BIASCOMP_Pos) & ADC0_FUSES_BIASCOMP_Msk;
-    ADC0->CALIB.bit.BIASR2R = (ADC0_FUSES_BIASR2R_ADDR >> ADC0_FUSES_BIASR2R_Pos) & ADC0_FUSES_BIASR2R_Msk;
-    ADC0->CALIB.bit.BIASREFBUF = (ADC0_FUSES_BIASREFBUF_ADDR >> ADC0_FUSES_BIASREFBUF_Pos) & ADC0_FUSES_BIASREFBUF_Msk;
+    ADC0->CALIB.bit.BIASCOMP = ((*(uint32_t *)ADC0_FUSES_BIASCOMP_ADDR) & ADC0_FUSES_BIASCOMP_Msk) >> ADC0_FUSES_BIASCOMP_Pos;
+    ADC0->CALIB.bit.BIASR2R = ((*(uint32_t *)ADC0_FUSES_BIASR2R_ADDR) & ADC0_FUSES_BIASR2R_Msk) >> ADC0_FUSES_BIASR2R_Pos;
+    ADC0->CALIB.bit.BIASREFBUF = ((*(uint32_t *)ADC0_FUSES_BIASREFBUF_ADDR) & ADC0_FUSES_BIASREFBUF_Msk) >> ADC0_FUSES_BIASREFBUF_Pos;
 
     //Enable
     ADC0->CTRLA.bit.ENABLE = 1;