diff --git a/src/ifcparse/IfcCharacterDecoder.cpp b/src/ifcparse/IfcCharacterDecoder.cpp
index a49cee2eed..30e8518cab 100644
--- a/src/ifcparse/IfcCharacterDecoder.cpp
+++ b/src/ifcparse/IfcCharacterDecoder.cpp
@@ -118,6 +118,7 @@ IfcCharacterDecoder::~IfcCharacterDecoder() {
   destination = 0;
   converter = 0;
   compatibility_converter = 0;
+  ucnv_flushCache();
 #endif
 }
 IfcCharacterDecoder::operator std::string() {