diff --git a/examples/img2twit.cpp b/examples/img2twit.cpp
index 599c9b2..0afdc77 100644
--- a/examples/img2twit.cpp
+++ b/examples/img2twit.cpp
@@ -832,7 +832,7 @@ int main(int argc, char *argv[])
             }
             break;
         case 'q':
-            ITERATIONS_PER_POINT = 10 * atoi(myoptarg);
+            ITERATIONS_PER_POINT = 10 * atof(myoptarg);
             if(ITERATIONS_PER_POINT < 0)
                 ITERATIONS_PER_POINT = 0;
             else if(ITERATIONS_PER_POINT > 100)