diff --git a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
index 94c124f039f..a6e14e3dae9 100644
--- a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
+++ b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
@@ -712,10 +712,15 @@ static QSqlField qMakeFieldInfo(const SQLHANDLE hStmt, int i, QString *errorMess
     f.setAutoValue(isAutoValue(hStmt, i));
     QVarLengthArray<SQLTCHAR> tableName(TABLENAMESIZE);
     SQLSMALLINT tableNameLen;
-    r = SQLColAttribute(hStmt, i + 1, SQL_DESC_BASE_TABLE_NAME, tableName.data(),
-                        TABLENAMESIZE, &tableNameLen, 0);
+    r = SQLColAttribute(hStmt,
+                        i + 1,
+                        SQL_DESC_BASE_TABLE_NAME,
+                        tableName.data(),
+                        SQLSMALLINT(tableName.size() * sizeof(SQLTCHAR)), // SQLColAttribute needs/returns size in bytes
+                        &tableNameLen,
+                        0);
     if (r == SQL_SUCCESS)
-        f.setTableName(fromSQLTCHAR(tableName, tableNameLen));
+        f.setTableName(fromSQLTCHAR(tableName, tableNameLen / sizeof(SQLTCHAR)));
     return f;
 }