diff --git a/Assets/UniGLTF/Editor/UniGLTF.Editor.asmdef b/Assets/UniGLTF/Editor/UniGLTF.Editor.asmdef
index bad5461504..46cc4b4002 100644
--- a/Assets/UniGLTF/Editor/UniGLTF.Editor.asmdef
+++ b/Assets/UniGLTF/Editor/UniGLTF.Editor.asmdef
@@ -17,6 +17,27 @@
     "precompiledReferences": [],
     "autoReferenced": false,
     "defineConstraints": [],
-    "versionDefines": [],
+    "versionDefines": [
+        {
+            "name": "org.khronos.unitygltf",
+            "expression": "",
+            "define": "UNIGLTF_DISABLE_DEFAULT_GLB_IMPORTER"
+        },
+        {
+            "name": "org.khronos.unitygltf",
+            "expression": "",
+            "define": "UNIGLTF_DISABLE_DEFAULT_GLTF_IMPORTER"
+        },
+        {
+            "name": "com.atteneder.gltfast",
+            "expression": "",
+            "define": "UNIGLTF_DISABLE_DEFAULT_GLB_IMPORTER"
+        },
+        {
+            "name": "com.atteneder.gltfast",
+            "expression": "",
+            "define": "UNIGLTF_DISABLE_DEFAULT_GLTF_IMPORTER"
+        }
+    ],
     "noEngineReferences": false
 }
\ No newline at end of file