diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index bf39807ba3..79d08749cb 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -319,7 +319,7 @@
                 "extruder_prime_pos_x":
                 {
                     "label": "Extruder Prime X Position",
-                    "description": "The x coordinate of the position where the nozzle primes at the start of printing.",
+                    "description": "The X coordinate of the position where the nozzle primes at the start of printing.",
                     "type": "float",
                     "unit": "mm",
                     "default_value": 0,
@@ -331,7 +331,7 @@
                 "extruder_prime_pos_y":
                 {
                     "label": "Extruder Prime Y Position",
-                    "description": "The y coordinate of the position where the nozzle primes at the start of printing.",
+                    "description": "The Y coordinate of the position where the nozzle primes at the start of printing.",
                     "type": "float",
                     "unit": "mm",
                     "default_value": 0,
@@ -343,7 +343,7 @@
                 "extruder_prime_pos_z":
                 {
                     "label": "Extruder Prime Z Position",
-                    "description": "The z coordinate of the position where the nozzle primes at the start of printing.",
+                    "description": "The Z coordinate of the position where the nozzle primes at the start of printing.",
                     "type": "float",
                     "unit": "mm",
                     "default_value": 0,