diff --git a/source/mod_settings.f90 b/source/mod_settings.f90
index 331460c59854bb2820fb45b804ced7b1f043338c..4b54d3c3d67bfc518688e8286b88fe0a79ef01cc 100644
--- a/source/mod_settings.f90
+++ b/source/mod_settings.f90
@@ -646,7 +646,19 @@ module mod_settings
       config%satellite = .false.
       config%ground = .false.
       config%selectobs = .false.
+
+      !initialize values for config, overwritten by any values in SETTINGS_config file
       config%trunc = 1.e-3
+      config%ffferr = 1.e-3
+      config%coeff = 1.0
+      config%measerr = 1.e-3
+      config%cinierr = 1.e-3
+      config%flxerr = 1.e-3
+      config%flxerr_ll = 1.e-9
+      config%sigma_land = 150.
+      config%sigma_ocean = 2000.
+      config%sigmatime = 15.
+      config%globerr = -1
 
      ! open file
       open (100, file = trim (filename), status = 'old', iostat=ierr)