diff --git a/tty/Terminal_darwin.go b/tty/Terminal_bsd.go
similarity index 88%
rename from tty/Terminal_darwin.go
rename to tty/Terminal_bsd.go
index 0726279..15e06e0 100644
--- a/tty/Terminal_darwin.go
+++ b/tty/Terminal_bsd.go
@@ -1,3 +1,5 @@
+//go:build darwin || freebsd
+
 package tty
 
 import "golang.org/x/sys/unix"
diff --git a/tty/Terminal_linux.go b/tty/Terminal_linux.go
index 4e44a64..023c564 100644
--- a/tty/Terminal_linux.go
+++ b/tty/Terminal_linux.go
@@ -1,3 +1,5 @@
+//go:build linux
+
 package tty
 
 import "golang.org/x/sys/unix"
diff --git a/tty/Terminal_other.go b/tty/Terminal_other.go
new file mode 100644
index 0000000..3ea5ee8
--- /dev/null
+++ b/tty/Terminal_other.go
@@ -0,0 +1,8 @@
+//go:build !darwin && !freebsd && !linux && !windows
+
+package tty
+
+// IsTerminal is always false on unsupported platforms.
+func IsTerminal(fd uintptr) bool {
+	return false
+}
diff --git a/tty/Terminal_windows.go b/tty/Terminal_windows.go
index c7355d1..0bf1927 100644
--- a/tty/Terminal_windows.go
+++ b/tty/Terminal_windows.go
@@ -1,3 +1,5 @@
+//go:build windows
+
 package tty
 
 import "golang.org/x/sys/windows"