diff --git a/lib/core/optiondict.py b/lib/core/optiondict.py
index bb308dbee..8951204d5 100644
--- a/lib/core/optiondict.py
+++ b/lib/core/optiondict.py
@@ -77,7 +77,7 @@ optDict = {
             "Techniques":    {
                                "timeSec":           "integer",
                                "unionTest":         "boolean",
-                               "uCols":             "integer",
+                               "uCols":             "string",
                                "uChar":             "string"
                              },