diff --git a/src/io/io.f90 b/src/io/io.f90
index 2d8334b60..3a5a931b6 100644
--- a/src/io/io.f90
+++ b/src/io/io.f90
@@ -551,7 +551,7 @@ module subroutine io_param_reader(self, unit, iotype, v_list, iostat, iomsg)
                   read(param_value, *, err = 667, iomsg = iomsg) param%Ecollisions
                case("EUNTRACKED")
                   read(param_value, *, err = 667, iomsg = iomsg) param%Euntracked
-               case ("NPLMAX", "NTPMAX", "GMTINY", "PARTICLE_OUT", "FRAGMENTATION", "SEED", "YARKOVSKY", "YORP") ! Ignore SyMBA-specific, not-yet-implemented, or obsolete input parameters
+               case ("NPLMAX", "NTPMAX", "GMTINY", "MIN_GMFRAG", "PARTICLE_OUT", "FRAGMENTATION", "SEED", "YARKOVSKY", "YORP") ! Ignore SyMBA-specific, not-yet-implemented, or obsolete input parameters
                case default
                   write(iomsg,*) "Unknown parameter -> ",param_name
                   iostat = -1