diff --git a/boards/nucleo-f031k6/doc.txt b/boards/nucleo-f031k6/doc.txt
index a55c4491a5..4674e14b42 100644
--- a/boards/nucleo-f031k6/doc.txt
+++ b/boards/nucleo-f031k6/doc.txt
@@ -5,7 +5,7 @@
 
 ## Overview
 
-The Nucleo-F031K6 is a board from ST's Nucleo family supporting ARM Cortex-M0 
+The Nucleo-F031K6 is a board from ST's Nucleo family supporting ARM Cortex-M0
 STM32F031K6 microcontroller with 4KiB of RAM and 64KiB of Flash.
 
 ## Flashing the Board Using ST-LINK Removable Media
diff --git a/boards/nucleo-f042k6/doc.txt b/boards/nucleo-f042k6/doc.txt
index c53280b65a..2d4f0b6e2a 100644
--- a/boards/nucleo-f042k6/doc.txt
+++ b/boards/nucleo-f042k6/doc.txt
@@ -5,7 +5,7 @@
 
 ## Overview
 
-The Nucleo-F042K6 is a board from ST's Nucleo family supporting ARM Cortex-M0 
+The Nucleo-F042K6 is a board from ST's Nucleo family supporting ARM Cortex-M0
 STM32F042K6 microcontroller with 6KiB of RAM and 32KiB of Flash.
 
 ## Flashing the Board Using ST-LINK Removable Media