diff --git a/src/io/io_input.f90 b/src/io/io_input.f90
index 0686c771..5b69fb4d 100644
--- a/src/io/io_input.f90
+++ b/src/io/io_input.f90
@@ -84,7 +84,7 @@ subroutine io_input(infile,user)
    user%testtally = .false.
    user%killatmaxcrater = .false.
    user%doporosity = .false.
-   user%soften_factor = 18.5_DP
+   user%soften_factor = 37.0_DP
    user%soften_slope = 1.8_DP
    user%ejecta_truncation = 10.0_DP