Fix Windows build error

fixes #5584

diff --git a/lib/perfdata/elasticwriter.cpp b/lib/perfdata/elasticwriter.cpp
index 83278bea7222829c712d6334f9574136f48140e1..03423404cc8a89537882264e2c4e83de0d89af13 100644 (file)
--- a/lib/perfdata/elasticwriter.cpp
+++ b/lib/perfdata/elasticwriter.cpp
@@ -581,5 +581,5 @@ String ElasticWriter::FormatTimestamp(double ts)
         */
        int milliSeconds = static_cast<int>((ts - static_cast<int>(ts)) * 1000);
 
-       return Utility::FormatDateTime("%Y-%m-%dT%H:%M:%S", ts) + "." + String(milliSeconds) + Utility::FormatDateTime("%z", ts);
+       return Utility::FormatDateTime("%Y-%m-%dT%H:%M:%S", ts) + "." + Convert::ToString(milliSeconds) + Utility::FormatDateTime("%z", ts);
 }