diff --git a/radio/src/targets/st16/hal.h b/radio/src/targets/st16/hal.h
index c32be675d..5996eedd6 100644
--- a/radio/src/targets/st16/hal.h
+++ b/radio/src/targets/st16/hal.h
@@ -219,7 +219,7 @@
 #define ADC_EXT_DMA_STREAM              LL_DMA_STREAM_0
 #define ADC_EXT_DMA_STREAM_IRQ          DMA2_Stream0_IRQn
 #define ADC_EXT_DMA_STREAM_IRQHandler   DMA2_Stream0_IRQHandler
-#define ADC_EXT_SAMPTIME                LL_ADC_SAMPLINGTIME_64CYCLES_5
+#define ADC_EXT_SAMPTIME                LL_ADC_SAMPLINGTIME_8CYCLES_5
 
 #define ADC_VREF_PREC2                  329
 
diff --git a/radio/src/targets/tx15/hal.h b/radio/src/targets/tx15/hal.h
index 83b70b7eb..3450d2034 100644
--- a/radio/src/targets/tx15/hal.h
+++ b/radio/src/targets/tx15/hal.h
@@ -223,7 +223,7 @@ TIM17:	ROTARY_ENCODER_TIMER
 #define ADC_EXT_DMA_STREAM              LL_DMA_STREAM_0
 #define ADC_EXT_DMA_STREAM_IRQ          DMA2_Stream0_IRQn
 #define ADC_EXT_DMA_STREAM_IRQHandler   DMA2_Stream0_IRQHandler
-#define ADC_EXT_SAMPTIME                LL_ADC_SAMPLINGTIME_64CYCLES_5  // No hardware oversampling on ADC3
+#define ADC_EXT_SAMPTIME                LL_ADC_SAMPLINGTIME_8CYCLES_5
 
 #define ADC_VREF_PREC2                  330