diff --git a/tsg_util/headerForm.m b/tsg_util/headerForm.m
index 35d3c1e054a8724c1037499a147778a5c0755595..0869bf2fa1987e03614a4607cbe264874df4d451 100644
--- a/tsg_util/headerForm.m
+++ b/tsg_util/headerForm.m
@@ -661,7 +661,7 @@ uiwait(hHeaderFig);
         elseif strcmpi(cle, padding('DATE', tsg.dim.COEF_CONV_SIZE))
           value = datestr(julianToDatenum(tsg.(var)(ii)), 'yyyymmdd');
         else
-          value = num2str(tsg.(var)(ii),'%f');
+          value = num2str(tsg.(var)(ii),'%8.7g');
         end
         
         % concate variable name with key: eg SSJT_CALCOEF_H