diff --git a/tools/export/iar/iar_definitions.json b/tools/export/iar/iar_definitions.json
index f5e588be61..5ef5b21a90 100644
--- a/tools/export/iar/iar_definitions.json
+++ b/tools/export/iar/iar_definitions.json
@@ -96,9 +96,6 @@
     "LPC54628J512ET180": {
         "OGChipSelectEditMenu": "LPC54618J512\tNXP LPC54618J512"
     },
-    "MIMXRT1052": {
-        "OGChipSelectEditMenu": "MIMXRT1052xxx6B\tNXP MIMXRT1052xxx6B"
-    },
     "STM32F072RB": {
         "OGChipSelectEditMenu": "STM32F072RB\tST STM32F072RB"
     },