diff --git a/README.md b/README.md
line changes: +2/-0
index 89a53f6..2c9a07c
--- a/README.md
+++ b/README.md

@@ -44,6 +44,7 @@ and the main stack for exception handling.
 
 In user mode, the MPU pokes out several holes in the address space.
 
+```
 0x00000000  +------------------+
             |       ROM        |
 0x00080000  +------------------+

@@ -65,6 +66,7 @@ In user mode, the MPU pokes out several holes in the address space.
 0x40000000  +------------------+
             |   Peripherals    |
 0x60000000  +------------------+
+```
 
 There's of course a lot more to the memory map, and I recommend perusing
 the [ATSAM3X/A datasheet](http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-11057-32-bit-Cortex-M3-Microcontroller-SAM3X-SAM3A_Datasheet.pdf) for more information.