diff --git a/gtk2_ardour/utils.cc b/gtk2_ardour/utils.cc
index 952a393f27..891ea86c2c 100644
--- a/gtk2_ardour/utils.cc
+++ b/gtk2_ardour/utils.cc
@@ -598,6 +598,7 @@ key_is_legal_for_numeric_entry (guint keyval)
 	case GDK_comma:
 		if (comma_decimal < 0) {
 			std::lconv* lc = std::localeconv();
+			cerr << "***** Locale decimal point = [" << lc->decimal_point << "]\n";
 			if (strchr (lc->decimal_point, ',') != 0) {
 				comma_decimal = 1;
 			} else {