diff --git a/boards/stm32_common/ltdc/framebuffer_ltdc.adb b/boards/stm32_common/ltdc/framebuffer_ltdc.adb
index a4854ce07..b27d5540a 100644
--- a/boards/stm32_common/ltdc/framebuffer_ltdc.adb
+++ b/boards/stm32_common/ltdc/framebuffer_ltdc.adb
@@ -29,8 +29,6 @@
 --                                                                          --
 ------------------------------------------------------------------------------
 
-with Ada.Unchecked_Conversion;
-
 with STM32.DMA2D.Interrupt;
 with STM32.DMA2D.Polling;
 with STM32.SDRAM;           use STM32.SDRAM;
diff --git a/boards/stm32_common/otm8009a/framebuffer_dsi.adb b/boards/stm32_common/otm8009a/framebuffer_dsi.adb
index 54db4e48f..6abfa2fec 100644
--- a/boards/stm32_common/otm8009a/framebuffer_dsi.adb
+++ b/boards/stm32_common/otm8009a/framebuffer_dsi.adb
@@ -30,7 +30,6 @@
 ------------------------------------------------------------------------------
 
 with Ada.Real_Time;        use Ada.Real_Time;
-with Ada.Unchecked_Conversion;
 with Ada.Interrupts.Names;
 
 with Cortex_M.Cache;
diff --git a/boards/stm32_common/stm32f429disco/framebuffer_ili9341.adb b/boards/stm32_common/stm32f429disco/framebuffer_ili9341.adb
index fdd4fc31c..79f010f22 100644
--- a/boards/stm32_common/stm32f429disco/framebuffer_ili9341.adb
+++ b/boards/stm32_common/stm32f429disco/framebuffer_ili9341.adb
@@ -29,8 +29,6 @@
 --                                                                          --
 ------------------------------------------------------------------------------
 
-with Ada.Unchecked_Conversion;
-
 with STM32.Board;          use STM32.Board;
 with STM32.Device;         use STM32.Device;
 with STM32.GPIO;           use STM32.GPIO;
diff --git a/boards/stm32_common/stm32f469disco/touch_panel_ft6x06.adb b/boards/stm32_common/stm32f469disco/touch_panel_ft6x06.adb
index 1336cccaf..f3eb4c84a 100644
--- a/boards/stm32_common/stm32f469disco/touch_panel_ft6x06.adb
+++ b/boards/stm32_common/stm32f469disco/touch_panel_ft6x06.adb
@@ -31,8 +31,6 @@
 
 --  Based on ft6x06.h from MCD Application Team
 
-with Ada.Unchecked_Conversion;
-
 with STM32.Board;          use STM32.Board;
 with STM32.Device;         use STM32.Device;
 with STM32.I2C;
diff --git a/boards/stm32_common/stm32f746disco/touch_panel_ft5336.adb b/boards/stm32_common/stm32f746disco/touch_panel_ft5336.adb
index 62ad78691..f33ca3320 100644
--- a/boards/stm32_common/stm32f746disco/touch_panel_ft5336.adb
+++ b/boards/stm32_common/stm32f746disco/touch_panel_ft5336.adb
@@ -31,12 +31,9 @@
 
 --  Based on ft5336.h from MCD Application Team
 
-with Ada.Real_Time;        use Ada.Real_Time;
-with Ada.Unchecked_Conversion;
-
-with HAL.Touch_Panel;      use HAL.Touch_Panel;
-
-with STM32.Board;          use STM32.Board;
+with Ada.Real_Time;   use Ada.Real_Time;
+with HAL.Touch_Panel; use HAL.Touch_Panel;
+with STM32.Board;     use STM32.Board;
 with STM32.Setup;
 
 package body Touch_Panel_FT5336 is
diff --git a/boards/stm32_common/stm32f769disco/touch_panel_ft6x06.adb b/boards/stm32_common/stm32f769disco/touch_panel_ft6x06.adb
index 993dc5b05..5afcfac3b 100644
--- a/boards/stm32_common/stm32f769disco/touch_panel_ft6x06.adb
+++ b/boards/stm32_common/stm32f769disco/touch_panel_ft6x06.adb
@@ -32,8 +32,6 @@
 --  Based on ft6x06.h from MCD Application Team
 
 with Ada.Real_Time;        use Ada.Real_Time;
-with Ada.Unchecked_Conversion;
-
 with STM32.Board;          use STM32.Board;
 with STM32.I2C;            use STM32.I2C;
 with STM32.Setup;