diff --git a/doc/go1.1.html b/doc/go1.1.html
index 6564b8f75d..fac922910a 100644
--- a/doc/go1.1.html
+++ b/doc/go1.1.html
@@ -420,6 +420,17 @@ An ARMv6 or later processor is required for freebsd/arm or
Go 1.1 adds experimental support for cgo on linux/arm.
+When cross-compiling, the go tool will disable cgo
+support by default.
+
+To explicitly enable cgo, set CGO_ENABLED=1.
+