diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index d6127e7f79..1d49460681 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -1080,6 +1080,18 @@
                     "maximum_value_warning": "2 * line_width",
                     "maximum_value": "min_bead_width * 3 * math.pi"
                 },
+                "wall_transition_angle":
+                {
+                    "label": "Wall Transition Angle",
+                    "description": "When transitioning between different numbers of walls as the part becomes thinner, two adjacent walls will join together at this angle. This can make the walls come together faster than what the Wall Transition Length indicates, filling the space better.",
+                    "type": "float",
+                    "unit": "°",
+                    "default_value": 30,
+                    "minimum_value": "1",
+                    "minimum_value_warning": "15",
+                    "maximum_value_warning": "50",
+                    "maximum_value": "59"
+                },
                 "wall_0_wipe_dist":
                 {
                     "label": "Outer Wall Wipe Distance",