diff --git a/resources/machines/ultimaker2_olsson.json b/resources/machines/ultimaker2_olsson.json
index 106c1c5f78..eac32e88a2 100644
--- a/resources/machines/ultimaker2_olsson.json
+++ b/resources/machines/ultimaker2_olsson.json
@@ -15,7 +15,7 @@
         "machine_nozzle_head_distance": { "default": 5 },
         "machine_nozzle_expansion_angle": { "default": 45 },
         "machine_height": { "default": 203 },
-        "machine_heat_zone_length": { "default": 16 },
+        "machine_heat_zone_length": { "default": 20 },
         "gantry_height": { "default": 52 }
     }
 }
diff --git a/resources/machines/ultimaker2plus.json b/resources/machines/ultimaker2plus.json
index e9114b769f..56635f915f 100644
--- a/resources/machines/ultimaker2plus.json
+++ b/resources/machines/ultimaker2plus.json
@@ -18,7 +18,7 @@
         "gantry_height": { "default": 52 },
         "machine_nozzle_head_distance": { "default": 5 },
         "machine_nozzle_expansion_angle": { "default": 45 },
-        "machine_heat_zone_length": { "default": 16 },
+        "machine_heat_zone_length": { "default": 20 },
         "machine_head_with_fans_polygon":
         {
             "default": [