diff --git a/cpu/stm32f1/include/periph_cpu.h b/cpu/stm32f1/include/periph_cpu.h
index 006f5016b7..872cf42edf 100644
--- a/cpu/stm32f1/include/periph_cpu.h
+++ b/cpu/stm32f1/include/periph_cpu.h
@@ -61,12 +61,6 @@ extern "C" {
  */
 #define PM_NUM_MODES        (2U)
 
-/**
- * @brief   Override the default initial PM blocker
- * @todo   we block all modes per default, until PM is cleanly implemented
- */
-#define PM_BLOCKER_INITIAL  { .val_u32 = 0x01010101 }
-
 /**
  * @brief  Define the config flag for stop mode
  */
diff --git a/cpu/stm32l0/include/periph_cpu.h b/cpu/stm32l0/include/periph_cpu.h
index b149405e50..bba4472fcb 100644
--- a/cpu/stm32l0/include/periph_cpu.h
+++ b/cpu/stm32l0/include/periph_cpu.h
@@ -70,12 +70,6 @@ typedef struct {
     uint8_t chan;           /**< internal channel the pin is connected to */
 } adc_conf_t;
 
-/**
- * @brief   Override the default initial PM blocker
- * @todo   we block all modes per default, until PM is cleanly implemented
- */
-#define PM_BLOCKER_INITIAL  { .val_u32 = 0x01010101 }
-
 /**
  * @name    EEPROM configuration
  * @{