--- a/BasicExcel.cpp	2026-11-06 17:43:16.315666145 +0100
+++ b/BasicExcel.cpp	2026-11-06 17:51:33.569871488 +0100
@@ -6479,7 +6479,14 @@
 			break;
 
 		case BasicExcelCell::WSTRING:
-			os << cell.GetWString();
+                        const wchar_t* wstr = cell.GetWString();
+                        if (wstr) {
+                                size_t len = wcslen(wstr);
+                                vector<char> nstr(len * 4 + 1);
+                                size_t converted = wcstombs(&nstr[0], wstr, nstr.size());
+                                if (converted != (size_t)-1)
+                                        os << &nstr[0];
+                        }
 			break;
 	}
 	return os;