diff --git a/ui/vnc-enc-tight.c b/ui/vnc-enc-tight.c
index 59b59c0c79c63e8783dae0740a49f8ac2c2d9524..f02352cc466b5acf65f06318022f328ac3d2a018 100644
--- a/ui/vnc-enc-tight.c
+++ b/ui/vnc-enc-tight.c
@@ -181,6 +181,10 @@ tight_detect_smooth_image24(VncState *vs, int w, int h)
         }
     }
 
+    if (pixels == 0) {
+        return 0;
+    }
+
     /* 95% smooth or more ... */
     if (stats[0] * 33 / pixels >= 95) {
         return 0;
@@ -267,7 +271,9 @@ tight_detect_smooth_image24(VncState *vs, int w, int h)
                 y += w;                                                 \
             }                                                           \
         }                                                               \
-                                                                        \
+        if (pixels == 0) {                                              \
+            return 0;                                                   \
+        }                                                               \
         if ((stats[0] + stats[1]) * 100 / pixels >= 90) {               \
             return 0;                                                   \
         }                                                               \