diff --git a/CHANGELOG.md b/CHANGELOG.md
index cd63cd7ce..18f989b35 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,11 @@
 # 5.4.0
+  Changes from 5.3.0
     - Profiles
       - includes library guidance.lua that offers preliminary configuration on guidance.
     - Guidance
       - Handle Access tags for lanes, only considering valid lanes in lane-guidance (think car | car | bike | car)
+    - API:
+      - `annotations=true` now returns the data source id for each segment as `datasources`
 
 # 5.3.0
   Changes from 5.3.0-rc.3
diff --git a/docs/http.md b/docs/http.md
index d6ae028cb..c14d263e3 100644
--- a/docs/http.md
+++ b/docs/http.md
@@ -399,8 +399,8 @@ Represents a route between two waypoints.
 
    | annotations  |                                                                       |
    |--------------|-----------------------------------------------------------------------|
-   | true         | returns distance and durations of each coordinate along the route     |
-   | false        | will not exist                                                        |
+   | true         | An `Annotation` object containing node ids, durations and distances   |
+   | false        | `undefined`                                                           |
 
 #### Example
 
@@ -420,16 +420,28 @@ With `steps=false` and `annotations=true`:
 }
 ```
 
-#### Annotation data
+### Annotation
 
-Several fields are available as annotations.  They are:
+Annotation of the whole route leg with fine-grained information about each segment or node id.
+
+#### Properties
+
+- `distance`: The distance, in metres, between each pair of coordinates
+- `duration`: The duration between each pair of coordinates, in seconds
+- `datasources`: The index of the datasource for the speed between each pair of coordinates. `0` is the default profile, other values are supplied via `--segment-speed-file` to `osrm-contract`
+- `nodes`: The OSM node ID for each coordinate along the route, excluding the first/last user-supplied coordinates
+
+#### Example
+
+```json
+{
+  "distance": [5,5,10,5,5],
+  "duration": [15,15,40,15,15],
+  "datasources": [1,0,0,0,1],
+  "nodes": [49772551,49772552,49786799,49786800,49786801,49786802]
+}
+```
 
-   | field       | description                                                                                             |
-   |-------------|---------------------------------------------------------------------------------------------------------|
-   | distance    | the distance, in metres, between each pair of coordinates                                               |
-   | duration    | the duration between each pair of coordinates, in seconds                                               |
-   | datasources | the index of the datasource for the speed between each pair of coordinates. `0` is the default profile, other values are supplied via `--segment-speed-file` to `osrm-contract`                                 |
-   | nodes       | the OSM node ID for each coordinate along the route, excluding the first/last user-supplied coordinates |
 
 ### RouteStep