diff --git a/audio/audio.go b/audio/audio.go
index 3a6908c46..df78e47d3 100644
--- a/audio/audio.go
+++ b/audio/audio.go
@@ -193,8 +193,9 @@ func NewContext(sampleRate int) (*Context, error) {
 // In async mode, the audio never stops even when the game stops.
 func (c *Context) Update() error {
 	// Initialize c.driver lazily to enable calling NewContext in an 'init' function.
-	// Accessing driver functions requires that the environment is already initialized,
-	// but if Ebiten is used for a shared library, how init functions are called is unexpectable.
+	// Accessing driver functions requires the environment to be already initialized,
+	// but if Ebiten is used for a shared library, the timing when init functions are called
+	// is unexpectable.
 	// e.g. a variable for JVM on Android might not be set.
 	if c.driver == nil {
 		// TODO: Rename this other than player