diff --git a/doc/go1.5.html b/doc/go1.5.html
index 14b1938994..782e839565 100644
--- a/doc/go1.5.html
+++ b/doc/go1.5.html
@@ -360,7 +360,7 @@ Perhaps more important is that on machines where
 for a numbered register,
 such as <code>R13</code> for the stack pointer and
 <code>R15</code> for the hardware program counter
-on x86,
+on ARM,
 a reference to such a register that does not include a symbol
 is now illegal.
 For example, <code>SP</code> and <code>4(SP)</code> are