diff --git a/ports/stm32f4/boards/STM32F405_boot.ld b/ports/stm32f4/boards/STM32F405_boot.ld
index cff2af388e..64da3b6520 100644
--- a/ports/stm32f4/boards/STM32F405_boot.ld
+++ b/ports/stm32f4/boards/STM32F405_boot.ld
@@ -17,7 +17,7 @@ MEMORY
 _minimum_stack_size = 2K;
 _minimum_heap_size = 16K;
 
-/* Define tho top end of the stack.  The stack is full descending so begins just
+/* Define the top end of the stack.  The stack is full descending so begins just
    above last byte of RAM.  Note that EABI requires the stack to be 8-byte
    aligned for a call. */
 _estack = ORIGIN(RAM) + LENGTH(RAM);
@@ -105,4 +105,3 @@ SECTIONS
     .ARM.attributes 0 : { *(.ARM.attributes) }
 }
 
-