diff --git a/Demos/Device/ClassDriver/KeyboardMouse/KeyboardMouse.c b/Demos/Device/ClassDriver/KeyboardMouse/KeyboardMouse.c
index af6e839496..1c01730b02 100644
--- a/Demos/Device/ClassDriver/KeyboardMouse/KeyboardMouse.c
+++ b/Demos/Device/ClassDriver/KeyboardMouse/KeyboardMouse.c
@@ -217,7 +217,7 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn
 		  MouseReport->X =  1;
 
 		if (JoyStatus_LCL & JOY_PRESS)
-		  MouseReport->Button  = (1 << 0);
+		  MouseReport->Button |= (1 << 0);
 		
 		*ReportSize = sizeof(USB_MouseReport_Data_t);
 		return true;		
diff --git a/Demos/Device/ClassDriver/Mouse/Mouse.c b/Demos/Device/ClassDriver/Mouse/Mouse.c
index 22f0895ea0..48348c774a 100644
--- a/Demos/Device/ClassDriver/Mouse/Mouse.c
+++ b/Demos/Device/ClassDriver/Mouse/Mouse.c
@@ -155,7 +155,7 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn
 	  MouseReport->X =  1;
 
 	if (JoyStatus_LCL & JOY_PRESS)
-	  MouseReport->Button  = (1 << 0);
+	  MouseReport->Button |= (1 << 0);
 	  
 	if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 	  MouseReport->Button |= (1 << 1);
diff --git a/Demos/Device/ClassDriver/VirtualSerialMouse/VirtualSerialMouse.c b/Demos/Device/ClassDriver/VirtualSerialMouse/VirtualSerialMouse.c
index 5edda2f9d4..e7c899b79d 100644
--- a/Demos/Device/ClassDriver/VirtualSerialMouse/VirtualSerialMouse.c
+++ b/Demos/Device/ClassDriver/VirtualSerialMouse/VirtualSerialMouse.c
@@ -217,7 +217,7 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn
 	  MouseReport->X =  1;
 
 	if (JoyStatus_LCL & JOY_PRESS)
-	  MouseReport->Button  = (1 << 0);
+	  MouseReport->Button |= (1 << 0);
 	  
 	if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 	  MouseReport->Button |= (1 << 1);
diff --git a/Demos/DualRole/ClassDriver/MouseHostDevice/DeviceFunctions.c b/Demos/DualRole/ClassDriver/MouseHostDevice/DeviceFunctions.c
index b07c2be31c..0ae28255c8 100644
--- a/Demos/DualRole/ClassDriver/MouseHostDevice/DeviceFunctions.c
+++ b/Demos/DualRole/ClassDriver/MouseHostDevice/DeviceFunctions.c
@@ -123,7 +123,7 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn
 	  MouseReport->X = -1;
 
 	if (JoyStatus_LCL & JOY_PRESS)
-	  MouseReport->Button  = (1 << 0);
+	  MouseReport->Button |= (1 << 0);
 	  
 	if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 	  MouseReport->Button |= (1 << 1);