diff --git a/frigate/config/camera/mask.py b/frigate/config/camera/mask.py
index caba8aa6e..939957578 100644
--- a/frigate/config/camera/mask.py
+++ b/frigate/config/camera/mask.py
@@ -34,7 +34,7 @@ class MotionMaskConfig(FrigateBaseModel):
 
     @field_serializer("coordinates", when_used="json")
     def serialize_coordinates(self, value: Any, info):
-        return self.raw_coordinates
+        return self.raw_coordinates if self.raw_coordinates else value
 
     @field_serializer("raw_coordinates", when_used="json")
     def serialize_raw_coordinates(self, value: Any, info):
@@ -58,16 +58,16 @@ class ObjectMaskConfig(FrigateBaseModel):
     )
     raw_coordinates: Union[str, list[str]] = ""
 
+    @field_serializer("coordinates", when_used="json")
+    def serialize_coordinates(self, value: Any, info):
+        return self.raw_coordinates if self.raw_coordinates else value
+
+    @field_serializer("raw_coordinates", when_used="json")
+    def serialize_raw_coordinates(self, value: Any, info):
+        return None
+
     def get_formatted_name(self, mask_id: str) -> str:
         """Return the friendly name if set, otherwise return a formatted version of the mask ID."""
         if self.friendly_name:
             return self.friendly_name
         return mask_id.replace("_", " ").title()
-
-    @field_serializer("coordinates", when_used="json")
-    def serialize_coordinates(self, value: Any, info):
-        return self.raw_coordinates
-
-    @field_serializer("raw_coordinates", when_used="json")
-    def serialize_raw_coordinates(self, value: Any, info):
-        return None
diff --git a/frigate/config/config.py b/frigate/config/config.py
index 1bd61fbfd..5bc2518d5 100644
--- a/frigate/config/config.py
+++ b/frigate/config/config.py
@@ -788,6 +788,31 @@ class FrigateConfig(FrigateBaseModel):
             for key in object_keys:
                 camera_config.objects.filters[key] = FilterConfig()
 
+            # Process global object masks to set raw_coordinates
+            if camera_config.objects.mask:
+                processed_global_masks = {}
+                for mask_id, mask_config in camera_config.objects.mask.items():
+                    if mask_config:
+                        coords = mask_config.coordinates
+                        relative_coords = get_relative_coordinates(
+                            coords, camera_config.frame_shape
+                        )
+                        # Create a new ObjectMaskConfig with raw_coordinates set
+                        from frigate.config.camera.mask import ObjectMaskConfig
+
+                        processed_global_masks[mask_id] = ObjectMaskConfig(
+                            friendly_name=mask_config.friendly_name,
+                            enabled=mask_config.enabled,
+                            coordinates=relative_coords if relative_coords else coords,
+                            raw_coordinates=relative_coords
+                            if relative_coords
+                            else coords,
+                        )
+                    else:
+                        processed_global_masks[mask_id] = mask_config
+                camera_config.objects.mask = processed_global_masks
+                camera_config.objects.raw_mask = processed_global_masks
+
             # Apply global object masks and convert masks to numpy array
             for object, filter in camera_config.objects.filters.items():
                 # Merge global object masks with per-object filter masks