diff --git a/oox/source/core/xmlfilterbase.cxx b/oox/source/core/xmlfilterbase.cxx
index 4cd7665be98c..fe2055e6eda2 100644
--- a/oox/source/core/xmlfilterbase.cxx
+++ b/oox/source/core/xmlfilterbase.cxx
@@ -482,12 +482,9 @@ writeElement( FSHelperPtr pDoc, sal_Int32 nXmlElement, const util::DateTime& rTi
                 FSEND );
 
     char pStr[200];
-    // FIXME: my guess is that precision greater than millisecond in undesirable
-    //        (forbidden by the standard???)
-    snprintf( pStr, sizeof( pStr ), "%d-%02d-%02dT%02d:%02d:%02d.%09" SAL_PRIuUINT32 "Z",
+    snprintf( pStr, sizeof( pStr ), "%d-%02d-%02dT%02d:%02d:%02dZ",
             rTime.Year, rTime.Month, rTime.Day,
-            rTime.Hours, rTime.Minutes, rTime.Seconds,
-            rTime.NanoSeconds);
+            rTime.Hours, rTime.Minutes, rTime.Seconds );
 
     pDoc->write( pStr );