1 files changed, 4 insertions, 1 deletions
diff --git a/cpp/src/Ice/StringConverter.cpp b/cpp/src/Ice/StringConverter.cpp
index 1d426877379..e6b112fd1bc 100755
--- a/cpp/src/Ice/StringConverter.cpp
+++ b/cpp/src/Ice/StringConverter.cpp
@@ -141,7 +141,10 @@ WindowsStringConverter::toUTF8(const char* sourceStart,
     // First convert to UTF-16
     //
     int sourceSize = sourceEnd - sourceStart;
-    assert(sourceSize > 0);
+    if(sourceSize == 0)
+    {
+        return buffer.getMoreBytes(1, 0);
+    }
 
     size_t size = 0;
     int writtenWchar = 0;