diff --git a/docs/cpu.md b/docs/cpu.md
index 69a790e8c..ba490f149 100644
--- a/docs/cpu.md
+++ b/docs/cpu.md
@@ -19,7 +19,7 @@ similar to the PPC part in the PS3, so Cell documents often line up for the
 core instructions. The 360 adds some additional AltiVec instructions, though,
 which are only documented in a few places (like the gcc source code, etc).
 
-* [Free60 Info](http://www.free60.org/Xenon_(CPU))
+* [Free60 Info](http://www.free60.org/Xenon_\(CPU\))
 * [Power ISA docs](https://www.power.org/wp-content/uploads/2012/07/PowerISA_V2.06B_V2_PUBLIC.pdf) (aka 'PowerISA')
 * [PowerPC Programming Environments Manual](https://www-01.ibm.com/chips/techlib/techlib.nsf/techdocs/F7E732FF811F783187256FDD004D3797/$file/pem_64bit_v3.0.2005jul15.pdf) (aka 'pem_64')
 * [PowerPC Vector PEM](https://www-01.ibm.com/chips/techlib/techlib.nsf/techdocs/C40E4C6133B31EE8872570B500791108/$file/vector_simd_pem_v_2.07c_26Oct2006_cell.pdf)