diff --git a/resources/extruders/hctech_hc300-m1&m1h_extruder_0.def.json b/resources/extruders/hctech_hc300-m1&m1h_extruder_0.def.json
index fb45cbfc21..c950db18ec 100644
--- a/resources/extruders/hctech_hc300-m1&m1h_extruder_0.def.json
+++ b/resources/extruders/hctech_hc300-m1&m1h_extruder_0.def.json
@@ -3,7 +3,7 @@
     "name": "Extruder 1",
     "inherits": "fdmextruder",
     "metadata": {
-        "machine": "HCTECH_HC300-M1&M1H",
+        "machine": "hctech_hc300-m1&m1h",
         "position": "0"
     },
 
diff --git a/resources/extruders/hctech_hc300-m2h_extruder_0.def.json b/resources/extruders/hctech_hc300-m2h_extruder_0.def.json
index 49de3f449c..4dc7174338 100644
--- a/resources/extruders/hctech_hc300-m2h_extruder_0.def.json
+++ b/resources/extruders/hctech_hc300-m2h_extruder_0.def.json
@@ -3,7 +3,7 @@
     "name": "Left Extruder",
     "inherits": "fdmextruder",
     "metadata": {
-        "machine": "HCTECH_HC300-M2H",
+        "machine": "hctech_hc300-m2h",
         "position": "0"
     },
 
diff --git a/resources/extruders/hctech_hc300-m2h_extruder_1.def.json b/resources/extruders/hctech_hc300-m2h_extruder_1.def.json
index 023cd3d78d..11aa3ca2b8 100644
--- a/resources/extruders/hctech_hc300-m2h_extruder_1.def.json
+++ b/resources/extruders/hctech_hc300-m2h_extruder_1.def.json
@@ -3,7 +3,7 @@
     "name": "Right Extruder",
     "inherits": "fdmextruder",
     "metadata": {
-        "machine": "HCTECH_HC300-M2H",
+        "machine": "hctech_hc300-m2h",
         "position": "1"
     },
 
diff --git a/resources/extruders/hctech_hc300-m3_extruder_0.def.json b/resources/extruders/hctech_hc300-m3_extruder_0.def.json
index ee1eed7da2..b7923672a5 100644
--- a/resources/extruders/hctech_hc300-m3_extruder_0.def.json
+++ b/resources/extruders/hctech_hc300-m3_extruder_0.def.json
@@ -3,7 +3,7 @@
     "name": "Extruder 1",
     "inherits": "fdmextruder",
     "metadata": {
-        "machine": "HCTECH_HC300-M3",
+        "machine": "hctech_hc300-m3",
         "position": "0"
     },