diff --git a/STM32F1/boards.txt b/STM32F1/boards.txt
index 2c027fd..becf13d 100644
--- a/STM32F1/boards.txt
+++ b/STM32F1/boards.txt
@@ -284,4 +284,4 @@ genericSTM32F103Z.menu.upload_method.serialMethod.upload.tool=serial_upload
 genericSTM32F103Z.menu.upload_method.STLinkMethod=STLink
 genericSTM32F103Z.menu.upload_method.STLinkMethod.upload.protocol=STLink
 genericSTM32F103Z.menu.upload_method.STLinkMethod.upload.tool=stlink_upload
-genericSTM32F103Z.menu.upload_method.STLinkMethod.build.upload_flags=-DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1
+genericSTM32F103Z.menu.upload_method.STLinkMethod.build.upload_flags=-DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1   -DSERIAL_USB
diff --git a/STM32F1/cores/maple/boards.h b/STM32F1/cores/maple/boards.h
index 403250e..518f9a0 100644
--- a/STM32F1/cores/maple/boards.h
+++ b/STM32F1/cores/maple/boards.h
@@ -167,7 +167,9 @@ bool boardUsesPin(uint8 pin);
 /**
  * @brief Feature test: nonzero iff the board has SerialUSB.
  */
-#define BOARD_HAVE_SERIALUSB (defined(BOARD_USB_DISC_DEV) && \
-                              defined(BOARD_USB_DISC_BIT))
+ //Roger Clark. Change so that BOARD_HAVE_SERIALUSB is always true, so that it can be controller by -DSERIAL_USB
+#define BOARD_HAVE_SERIALUSB 1
+
+/*(defined(BOARD_USB_DISC_DEV) && defined(BOARD_USB_DISC_BIT))*/
 
 #endif
diff --git a/STM32F1/variants/generic_stm32f103z/wirish/boards_setup.cpp b/STM32F1/variants/generic_stm32f103z/wirish/boards_setup.cpp
index 7f5bbbe..2580747 100644
--- a/STM32F1/variants/generic_stm32f103z/wirish/boards_setup.cpp
+++ b/STM32F1/variants/generic_stm32f103z/wirish/boards_setup.cpp
@@ -74,11 +74,26 @@ namespace wirish {
         }
 
         __weak void board_setup_usb(void) {
-#if BOARD_HAVE_SERIALUSB
+      
+
+	
 	#ifdef SERIAL_USB 
+			
+			//gpio_set_mode(PIN_MAP[PA12].gpio_device, PIN_MAP[PA12].gpio_bit, GPIO_OUTPUT_PP);
+			gpio_write_bit(PIN_MAP[PA12].gpio_device, PIN_MAP[PA12].gpio_bit,0);
+
+			
+			for(volatile unsigned int i=0;i<5000000;i++)
+			{
+				asm("nop");
+			}
+			gpio_set_mode(PIN_MAP[PA12].gpio_device, PIN_MAP[PA12].gpio_bit, GPIO_INPUT_FLOATING);
+			for(volatile unsigned int i=0;i<5000000;i++)
+			{
+				asm("nop");
+			}
 			Serial.begin();// Roger Clark. Changed SerialUSB to Serial for Arduino sketch compatibility
 	#endif
-#endif
         }
 
         __weak void series_init(void) {