diff --git a/src/environment/windows.go b/src/environment/windows.go
index 4ffa6b38..7e32297c 100644
--- a/src/environment/windows.go
+++ b/src/environment/windows.go
@@ -55,6 +55,10 @@ func (env *ShellEnvironment) Root() bool {
 }
 
 func (env *ShellEnvironment) Home() string {
+	env.lock.Lock()
+	defer func() {
+		env.lock.Unlock()
+	}()
 	home := os.Getenv("HOME")
 	defer func() {
 		env.log(Debug, "Home", home)