diff --git a/NAMESPACE b/NAMESPACE
index b6f6c4555f053774fac3f7eab3cabb0ee0f65f8e..dec0b61c6d3164e2da2fce98757ef7bb9225d3f6 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -30,6 +30,4 @@ export(checkStartEndDate)
 export(dateFormatCheck)
 export(formatCheckParameterCd)
 export(formatCheckSiteNumber)
-exportClasses(fluxUnit)
-exportClasses(fluxUnit)
 import(zoo)