diff --git a/resources/definitions/bfb.def.json b/resources/definitions/bfb.def.json
index e88c8c792b..caee91291a 100644
--- a/resources/definitions/bfb.def.json
+++ b/resources/definitions/bfb.def.json
@@ -4,7 +4,6 @@
     "inherits": "fdmprinter",
     "metadata": {
         "visible": true,
-        "author": "Ultimaker",
         "manufacturer": "BFB",
         "file_formats": "text/x-gcode",
         "platform_offset": [ 0, 0, 0],
diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index c4051d806f..843c3592ec 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -4,7 +4,7 @@
     "metadata":
     {
         "type": "machine",
-        "author": "Ultimaker",
+        "author": "Unknown",
         "manufacturer": "Unknown",
         "setting_version": 19,
         "file_formats": "text/x-gcode;model/stl;application/x-wavefront-obj;application/x3g",
diff --git a/resources/definitions/julia.def.json b/resources/definitions/julia.def.json
index 43c62a46b2..2055191e61 100644
--- a/resources/definitions/julia.def.json
+++ b/resources/definitions/julia.def.json
@@ -4,7 +4,6 @@
     "inherits": "fdmprinter",
     "metadata": {
         "visible": true,
-        "author": "Ultimaker",
         "manufacturer": "Fracktal",
         "file_formats": "text/x-gcode",
         "platform_offset": [ 0, 0, 0],
diff --git a/resources/definitions/makerbotreplicator.def.json b/resources/definitions/makerbotreplicator.def.json
index 24b556e1ee..6977ee8f5c 100644
--- a/resources/definitions/makerbotreplicator.def.json
+++ b/resources/definitions/makerbotreplicator.def.json
@@ -4,7 +4,6 @@
     "inherits": "fdmprinter",
     "metadata": {
         "visible": true,
-        "author": "Ultimaker",
         "manufacturer": "MakerBot",
         "machine_x3g_variant": "r1",
         "file_formats": "application/x3g",
diff --git a/resources/definitions/ord.def.json b/resources/definitions/ord.def.json
index 4a550602f2..0701133e54 100644
--- a/resources/definitions/ord.def.json
+++ b/resources/definitions/ord.def.json
@@ -4,7 +4,6 @@
     "inherits": "fdmprinter",
     "metadata": {
         "visible": true,
-        "author": "Ultimaker",
         "manufacturer": "ORD Solutions",
         "file_formats": "text/x-gcode",
         "machine_extruder_trains":
diff --git a/resources/definitions/punchtec_connect_xl.def.json b/resources/definitions/punchtec_connect_xl.def.json
index 9bae80b0ac..cda6caa1f6 100644
--- a/resources/definitions/punchtec_connect_xl.def.json
+++ b/resources/definitions/punchtec_connect_xl.def.json
@@ -4,7 +4,6 @@
     "inherits": "fdmprinter",
     "metadata": {
         "visible": true,
-        "author": "Ultimaker",
         "manufacturer": "Punchtec",
         "file_formats": "text/x-gcode",
         "machine_extruder_trains":
diff --git a/resources/definitions/robo_3d_r1.def.json b/resources/definitions/robo_3d_r1.def.json
index 5ef21cef8b..0187d13dd0 100644
--- a/resources/definitions/robo_3d_r1.def.json
+++ b/resources/definitions/robo_3d_r1.def.json
@@ -4,7 +4,6 @@
     "inherits": "fdmprinter",
     "metadata": {
         "visible": true,
-        "author": "Ultimaker",
         "manufacturer": "Robo 3D",
         "file_formats": "text/x-gcode",
         "platform_offset": [ 0, 0, 0],
diff --git a/resources/definitions/zone3d_printer.def.json b/resources/definitions/zone3d_printer.def.json
index 4c72422788..8939043e05 100644
--- a/resources/definitions/zone3d_printer.def.json
+++ b/resources/definitions/zone3d_printer.def.json
@@ -4,7 +4,6 @@
     "inherits": "fdmprinter",
     "metadata": {
         "visible": true,
-        "author": "Ultimaker",
         "manufacturer": "Zone3D",
         "file_formats": "text/x-gcode",
         "platform_offset": [ 0, 0, 0],