1 files changed, 6 insertions, 0 deletions
diff --git a/cui/source/tabpages/numpages.cxx b/cui/source/tabpages/numpages.cxx
index 3f0f8d4bbba3..9e9219c24acd 100644
--- a/cui/source/tabpages/numpages.cxx
+++ b/cui/source/tabpages/numpages.cxx
@@ -3247,6 +3247,12 @@ void SvxNumPositionTabPage::InitControls()
         nMask <<= 1;
 
     }
+    if (SVX_MAX_NUM <= nLvl)
+    {
+        OSL_ENSURE(false, "cannot happen.");
+        return;
+    }
+
     if(bSameDistBorderNum)
     {
         long nDistBorderNum;