diff --git a/uisimulator/win32/lcd-win32.c b/uisimulator/win32/lcd-win32.c
index 102e262346..cf335ed4b2 100644
--- a/uisimulator/win32/lcd-win32.c
+++ b/uisimulator/win32/lcd-win32.c
@@ -22,13 +22,13 @@
 #include "uisw32.h"
 #include "lcd.h"
 
-//
-// simulator specific code
-//
+/*
+ * simulator specific code
+ */
 
-// varaibles
-unsigned char       lcd_framebuffer[LCD_WIDTH][LCD_HEIGHT/8]; // the display
-char                bitmap[LCD_HEIGHT][LCD_WIDTH]; // the ui display
+/* varaibles */
+extern unsigned char lcd_framebuffer[LCD_WIDTH][LCD_HEIGHT/8]; /* the display */
+char bitmap[LCD_HEIGHT][LCD_WIDTH]; /* the ui display */
 
 BITMAPINFO2 bmi =
 {