diff --git a/backend/genesys.cc b/backend/genesys.cc
index 0368e21..5ec37bc 100644
--- a/backend/genesys.cc
+++ b/backend/genesys.cc
@@ -778,6 +778,12 @@ void sanei_genesys_create_default_gamma_table(Genesys_Device* dev,
size = 4096;
}
max = size - 1;
+ } else if (dev->model->asic_type == GENESYS_GL846
+ || dev->model->asic_type == GENESYS_GL847
+ || dev->model->asic_type == GENESYS_GL848
+ || dev->model->asic_type == GENESYS_GL124) {
+ size = 257;
+ max = 65535;
} else {
size = 256;
max = 65535;