diff --git a/src/os/exec_posix.go b/src/os/exec_posix.go
index 1e60365dba..4c8261295c 100644
--- a/src/os/exec_posix.go
+++ b/src/os/exec_posix.go
@@ -10,10 +10,11 @@ import (
 	"syscall"
 )
 
-// The only signal values guaranteed to be present in the os package
-// on all systems are Interrupt (send the process an interrupt) and
-// Kill (force the process to exit). Interrupt is not implemented on
-// Windows; using it with os.Process.Signal will return an error.
+// The only signal values guaranteed to be present in the os package on all
+// systems are os.Interrupt (send the process an interrupt) and os.Kill (force
+// the process to exit). On Windows, sending os.Interrupt to a process with
+// os.Process.Signal is not implemented; it will return an error instead of
+// sending a signal.
 var (
 	Interrupt Signal = syscall.SIGINT
 	Kill      Signal = syscall.SIGKILL