diff --git a/boards/b-l475e-iot01a/include/periph_conf.h b/boards/b-l475e-iot01a/include/periph_conf.h
index 4aa71e4dc4..5b015e98a0 100644
--- a/boards/b-l475e-iot01a/include/periph_conf.h
+++ b/boards/b-l475e-iot01a/include/periph_conf.h
@@ -19,6 +19,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_rtt_default.h"
diff --git a/boards/nucleo-l412kb/include/periph_conf.h b/boards/nucleo-l412kb/include/periph_conf.h
index 9c684d05fe..fefacd2a0a 100644
--- a/boards/nucleo-l412kb/include/periph_conf.h
+++ b/boards/nucleo-l412kb/include/periph_conf.h
@@ -23,6 +23,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_i2c1_pb6_pb7.h"
diff --git a/boards/nucleo-l432kc/include/periph_conf.h b/boards/nucleo-l432kc/include/periph_conf.h
index e6caabf9a9..4f019e0c6c 100644
--- a/boards/nucleo-l432kc/include/periph_conf.h
+++ b/boards/nucleo-l432kc/include/periph_conf.h
@@ -21,6 +21,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_i2c1_pb6_pb7.h"
diff --git a/boards/nucleo-l433rc/include/periph_conf.h b/boards/nucleo-l433rc/include/periph_conf.h
index 2113989bc5..9c6d4eb73d 100644
--- a/boards/nucleo-l433rc/include/periph_conf.h
+++ b/boards/nucleo-l433rc/include/periph_conf.h
@@ -19,6 +19,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_rtt_default.h"
diff --git a/boards/nucleo-l452re/include/periph_conf.h b/boards/nucleo-l452re/include/periph_conf.h
index a77edff324..8732dda7e9 100644
--- a/boards/nucleo-l452re/include/periph_conf.h
+++ b/boards/nucleo-l452re/include/periph_conf.h
@@ -25,6 +25,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_i2c1_pb8_pb9.h"
diff --git a/boards/nucleo-l476rg/include/periph_conf.h b/boards/nucleo-l476rg/include/periph_conf.h
index 707ca1f33a..e2e9b119dd 100644
--- a/boards/nucleo-l476rg/include/periph_conf.h
+++ b/boards/nucleo-l476rg/include/periph_conf.h
@@ -23,6 +23,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_i2c1_pb8_pb9.h"
diff --git a/boards/nucleo-l496zg/include/periph_conf.h b/boards/nucleo-l496zg/include/periph_conf.h
index de12e72eeb..50f8b5e432 100644
--- a/boards/nucleo-l496zg/include/periph_conf.h
+++ b/boards/nucleo-l496zg/include/periph_conf.h
@@ -19,6 +19,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_i2c1_pb8_pb9.h"
diff --git a/boards/p-l496g-cell02/include/periph_conf.h b/boards/p-l496g-cell02/include/periph_conf.h
index ad616ed1e2..0db00a00d8 100644
--- a/boards/p-l496g-cell02/include/periph_conf.h
+++ b/boards/p-l496g-cell02/include/periph_conf.h
@@ -19,6 +19,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_rtt_default.h"
diff --git a/boards/stm32l476g-disco/include/periph_conf.h b/boards/stm32l476g-disco/include/periph_conf.h
index 4c41bb86e3..b63384439d 100644
--- a/boards/stm32l476g-disco/include/periph_conf.h
+++ b/boards/stm32l476g-disco/include/periph_conf.h
@@ -19,6 +19,11 @@
 #ifndef PERIPH_CONF_H
 #define PERIPH_CONF_H
 
+/* Add specific clock configuration (HSE, LSE) for this board here */
+#ifndef CONFIG_BOARD_HAS_LSE
+#define CONFIG_BOARD_HAS_LSE            (1)
+#endif
+
 #include "periph_cpu.h"
 #include "l4/cfg_clock_default.h"
 #include "cfg_rtt_default.h"