diff --git a/examples/img2twit.cpp b/examples/img2twit.cpp
index 87894a6..599c9b2 100644
--- a/examples/img2twit.cpp
+++ b/examples/img2twit.cpp
@@ -949,7 +949,7 @@ int main(int argc, char *argv[])
         }
     }
     while((dh + 1) * dw <= TOTAL_CELLS) dh++;
-    while(dw * (dh + 1) <= TOTAL_CELLS) dw++;
+    while(dh * (dw + 1) <= TOTAL_CELLS) dw++;
 
     /* Print debug information */
     if(DEBUG_MODE)