diff --git a/src/modules/systemlib/mixer/mixer.h b/src/modules/systemlib/mixer/mixer.h
index 5063633cc0..f23a9dd4e3 100644
--- a/src/modules/systemlib/mixer/mixer.h
+++ b/src/modules/systemlib/mixer/mixer.h
@@ -235,7 +235,7 @@ protected:
 
 private:
 
-	/* do not allow to copy due to prt data members */
+	/* do not allow to copy due to pointer data members */
 	Mixer(const Mixer &);
 	Mixer &operator=(const Mixer &);
 };