diff --git a/os/hal/platforms/STM32F37x/adc_lld.h b/os/hal/platforms/STM32F37x/adc_lld.h
index c984dc24a..6d4fcb504 100644
--- a/os/hal/platforms/STM32F37x/adc_lld.h
+++ b/os/hal/platforms/STM32F37x/adc_lld.h
@@ -661,8 +661,8 @@ struct ADCDriver {
 #define SDADC_CONFR_GAIN_0P5X       (7U << 20)
 #define SDADC_CONFR_SE_MASK         (3U << 26)
 #define SDADC_CONFR_SE_DIFF         (0U << 26)
-#define SDADC_CONFR_SE_SE_OFF       (1U << 26)
-#define SDADC_CONFR_SE_SE_ZV        (3U << 26)
+#define SDADC_CONFR_SE_OFFSET       (1U << 26)
+#define SDADC_CONFR_SE_ZERO_VOLT    (3U << 26)
 #define SDADC_CONFR_COMMON_MASK     (3U << 30)
 #define SDADC_CONFR_COMMON_VSSSD    (0U << 30)
 #define SDADC_CONFR_COMMON_VDDSD2   (1U << 30)
diff --git a/testhal/STM32F37x/SDADC/Makefile b/testhal/STM32F37x/SDADC/Makefile
index 0090b317a..782a3b3d7 100644
--- a/testhal/STM32F37x/SDADC/Makefile
+++ b/testhal/STM32F37x/SDADC/Makefile
@@ -5,7 +5,7 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
diff --git a/testhal/STM32F37x/SDADC/main.c b/testhal/STM32F37x/SDADC/main.c
index 90b722183..4b3e69df4 100644
--- a/testhal/STM32F37x/SDADC/main.c
+++ b/testhal/STM32F37x/SDADC/main.c
@@ -54,7 +54,7 @@ static void adcerrorcallback(ADCDriver *adcp, adcerror_t err) {
 /*
  * ADC conversion group.
  * Mode:        Linear buffer, 8 samples of 1 channel, SW triggered.
- * Channels:    ADC_IN6P.
+ * Channels:    ADC_IN5P.
  */
 static const ADCConversionGroup adcgrpcfg1 = {
   FALSE,
@@ -63,14 +63,14 @@ static const ADCConversionGroup adcgrpcfg1 = {
   adcerrorcallback,
   .u.sdadc = {
     SDADC_CR2_JSWSTART,     /* CR2      */
-    SDADC_JCHGR_CH(6),      /* JCHGR    */
+    SDADC_JCHGR_CH(5),      /* JCHGR    */
     {                       /* CONFxR[3]*/
       SDADC_CONFR_GAIN_1X | SDADC_CONFR_SE_DIFF | SDADC_CONFR_COMMON_VSSSD,
       0,
       0
     },
     {                       /* CONFCHR[2]*/
-      SDADC_CONFCHR1_CH6(0),
+      SDADC_CONFCHR1_CH5(0),
       0
     }
   }