diff --git a/tdd_for_embedded_c/chapter04/src/LedDriver.c b/tdd_for_embedded_c/chapter04/src/LedDriver.c
index 855b890..a7d55f4 100644
--- a/tdd_for_embedded_c/chapter04/src/LedDriver.c
+++ b/tdd_for_embedded_c/chapter04/src/LedDriver.c
@@ -50,7 +50,7 @@ void LedDriver_Create(uint16_t *address) {
 }
 
 
-void LedDriver_Destroy(uint16_t *address) {
+void LedDriver_Destroy(void) {
 }
 
 
diff --git a/tdd_for_embedded_c/chapter04/src/LedDriver.h b/tdd_for_embedded_c/chapter04/src/LedDriver.h
index 3ca3fa1..d674a3d 100644
--- a/tdd_for_embedded_c/chapter04/src/LedDriver.h
+++ b/tdd_for_embedded_c/chapter04/src/LedDriver.h
@@ -5,7 +5,7 @@
 
 
 void LedDriver_Create(uint16_t *address);
-void LedDriver_Destroy(uint16_t *address);
+void LedDriver_Destroy(void);
 void LedDriver_TurnOn(int ledNumber);
 void LedDriver_TurnOff(int ledNumber);
 void LedDriver_TurnAllOn(void);