diff --git a/src/types.h b/src/types.h
index a3f3422b..49d6bfb2 100644
--- a/src/types.h
+++ b/src/types.h
@@ -1445,6 +1445,10 @@ inline uint32 build_bit_ui(uint32 beg, uint32 end)
     {
         end = 31;
     }
+    if (beg > 31)
+    {
+        beg = 31;
+    }
     if (end == 31)
     {
         myll = (uint32)(-1);