diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index f54a15e740..2efdc77e61 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -50,7 +50,7 @@
 #undef ALIGN
 #define ALIGN(a, b) (((a) + ((b) - 1)) & ~((b) - 1))
 
-#define PIXEL_SIZE 0.2936875 //1280x1024 is 14.8" x 11.9" 
+#define PIXEL_SIZE 0.2936875 /* 1280x1024 is 14.8" x 11.9" */
 
 #define QXL_MODE(_x, _y, _b, _o)                  \
     {   .x_res = _x,                              \