diff --git a/include/libopencm3/stm32/f1/adc.h b/include/libopencm3/stm32/f1/adc.h
index 9a3bd27f..0550bfd3 100644
--- a/include/libopencm3/stm32/f1/adc.h
+++ b/include/libopencm3/stm32/f1/adc.h
@@ -500,21 +500,6 @@ LGPL License Terms @ref lgpl_license
 #define ADC_SMPR1_SMP12_MSK		(0x7 << ADC_SMP12_LSB)
 #define ADC_SMPR1_SMP11_MSK		(0x7 << ADC_SMP11_LSB)
 #define ADC_SMPR1_SMP10_MSK		(0x7 << ADC_SMP10_LSB)
-/****************************************************************************/
-/* ADC_SMPR1 ADC Sample Time Selection for Channels */
-/** @defgroup adc_sample_r1 ADC Sample Time Selection for ADC1
-@ingroup adc_defines
-
-@{*/
-#define ADC_SMPR1_SMP_1DOT5CYC		0x0
-#define ADC_SMPR1_SMP_7DOT5CYC		0x1
-#define ADC_SMPR1_SMP_13DOT5CYC		0x2
-#define ADC_SMPR1_SMP_28DOT5CYC		0x3
-#define ADC_SMPR1_SMP_41DOT5CYC		0x4
-#define ADC_SMPR1_SMP_55DOT5CYC		0x5
-#define ADC_SMPR1_SMP_71DOT5CYC		0x6
-#define ADC_SMPR1_SMP_239DOT5CYC	0x7
-/**@}*/
 
 /* --- ADC_SMPR2 values ---------------------------------------------------- */
 
@@ -538,23 +523,8 @@ LGPL License Terms @ref lgpl_license
 #define ADC_SMPR2_SMP2_MSK		(0x7 << ADC_SMP2_LSB)
 #define ADC_SMPR2_SMP1_MSK		(0x7 << ADC_SMP1_LSB)
 #define ADC_SMPR2_SMP0_MSK		(0x7 << ADC_SMP0_LSB)
-/****************************************************************************/
-/* ADC_SMPR2 ADC Sample Time Selection for Channels */
-/** @defgroup adc_sample_r2 ADC Sample Time Selection for ADC2
-@ingroup adc_defines
 
-@{*/
-#define ADC_SMPR2_SMP_1DOT5CYC		0x0
-#define ADC_SMPR2_SMP_7DOT5CYC		0x1
-#define ADC_SMPR2_SMP_13DOT5CYC		0x2
-#define ADC_SMPR2_SMP_28DOT5CYC		0x3
-#define ADC_SMPR2_SMP_41DOT5CYC		0x4
-#define ADC_SMPR2_SMP_55DOT5CYC		0x5
-#define ADC_SMPR2_SMP_71DOT5CYC		0x6
-#define ADC_SMPR2_SMP_239DOT5CYC	0x7
-/**@}*/
-
-/* --- ADC_SMPRx generic values -------------------------------------------- */
+/* --- ADC_SMPRx values --------------------------------------------------- */
 /****************************************************************************/
 /* ADC_SMPRG ADC Sample Time Selection for Channels */
 /** @defgroup adc_sample_rg ADC Sample Time Selection for All Channels