diff --git a/sw/source/filter/html/css1atr.cxx b/sw/source/filter/html/css1atr.cxx
index f2dd202aa18e..d0674a2e1315 100644
--- a/sw/source/filter/html/css1atr.cxx
+++ b/sw/source/filter/html/css1atr.cxx
@@ -313,6 +313,7 @@ static void AddUnitPropertyValue(OStringBuffer &rOut, long nVal,
     case FUNIT_M:
     case FUNIT_KM:
         OSL_ENSURE( FUNIT_CM == eUnit, "Measuring unit not supported" );
+        //fall-through
     case FUNIT_CM:
         // 0.01cm = 5.7twip (not exact, but the UI is also not exact)
         nMul = 2540;    // 2.54 * 1000