diff --git a/encoder/ih264e_utils.c b/encoder/ih264e_utils.c
index 44e4cc0..3657f33 100644
--- a/encoder/ih264e_utils.c
+++ b/encoder/ih264e_utils.c
@@ -225,6 +225,14 @@
     {
         lvl_idx = 12;
     }
+    else if (level < IH264_LEVEL_51)
+    {
+        lvl_idx = 13;
+    }
+    else
+    {
+        lvl_idx = 14;
+    }
 
     return (lvl_idx);
 }