Updated cgo (markdown)
diff --git a/cgo.md b/cgo.md
index b0df901..daf2afa 100644
--- a/cgo.md
+++ b/cgo.md
@@ -327,7 +327,8 @@
In order to use cgo on Windows, you'll also need to first install a gcc compiler (for instance, mingw-w64) and have gcc.exe (etc.) in your PATH environment variable before compiling with cgo will work.
### environmental variables
-Go doesn't see variables set by C.setenv
+Go os.Getenv() doesn't see variables set by C.setenv()
+
### tests
_test.go files can't use cgo.
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