diff --git a/apps/gui/gwps.h b/apps/gui/gwps.h
index 3277037bfa..5c3b72603c 100644
--- a/apps/gui/gwps.h
+++ b/apps/gui/gwps.h
@@ -301,7 +301,8 @@ struct align_pos {
 
 #ifdef HAVE_LCD_BITMAP
 #define MAX_IMAGES (26*2) /* a-z and A-Z */
-#define IMG_BUFSIZE (LCD_HEIGHT * LCD_WIDTH * MAX_IMAGES/10)
+#define IMG_BUFSIZE ((LCD_HEIGHT*LCD_WIDTH*LCD_DEPTH/8) \
+                   + (2*LCD_HEIGHT*LCD_WIDTH/8))
 #define WPS_MAX_LINES (LCD_HEIGHT/5+1)
 #define FORMAT_BUFFER_SIZE 3072
 #else