diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 04c69c9497..295108f27b 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -4581,7 +4581,7 @@
                     "description": "Whether to prime the filament with a blob before printing. Turning this setting on will ensure that the extruder will have material ready at the nozzle before printing. Printing Brim or Skirt can act like priming too, in which case turning this setting off saves some time.",
                     "type": "bool",
                     "resolve": "any(extruderValues('prime_blob_enable'))",
-                    "default_value": true,
+                    "default_value": false,
                     "settable_per_mesh": false,
                     "settable_per_extruder": true,
                     "enabled": false
diff --git a/resources/definitions/ultimaker3.def.json b/resources/definitions/ultimaker3.def.json
index 72756de2a5..9e017688a2 100644
--- a/resources/definitions/ultimaker3.def.json
+++ b/resources/definitions/ultimaker3.def.json
@@ -78,7 +78,7 @@
         "prime_tower_position_x": { "value": "machine_depth - max(extruderValue(adhesion_extruder_nr, 'brim_width') * extruderValue(adhesion_extruder_nr, 'initial_layer_line_width_factor') / 100 if adhesion_type == 'brim' else (extruderValue(adhesion_extruder_nr, 'raft_margin') if adhesion_type == 'raft' else (extruderValue(adhesion_extruder_nr, 'skirt_gap') if adhesion_type == 'skirt' else 0)), max(extruderValues('travel_avoid_distance'))) - max(extruderValues('support_offset')) - sum(extruderValues('skirt_brim_line_width')) - 30" },
         "prime_tower_wipe_enabled": { "default_value": false },
 
-        "prime_blob_enable": { "enabled": true },
+        "prime_blob_enable": { "enabled": true, "default_value": true },
 
         "acceleration_enabled": { "value": "True" },
         "acceleration_layer_0": { "value": "acceleration_topbottom" },