diff --git a/CHANGELOG.md b/CHANGELOG.md
index 045cf951e..6559d22fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
   - Changes from 5.20.0
     - Features:
       - ADDED: all waypoints in responses now contain a distance property between the original coordinate and the snapped location. [#5255](https://github.com/Project-OSRM/osrm-backend/pull/5255)
-      - ADDED: if `fallback_speed` is used, a new structure `estimated_cells` will describe which cells contain estimated values [#5259](https://github.com/Project-OSRM/osrm-backend/pull/5259)
+      - ADDED: if `fallback_speed` is used, a new structure `fallback_speed_cells` will describe which cells contain estimated values [#5259](https://github.com/Project-OSRM/osrm-backend/pull/5259)
     - Table:
       - ADDED: new parameter `scale_factor` which will scale the cell `duration` values by this factor. [#5298](https://github.com/Project-OSRM/osrm-backend/pull/5298)
 
diff --git a/docs/http.md b/docs/http.md
index 314e8008a..56c290512 100644
--- a/docs/http.md
+++ b/docs/http.md
@@ -284,7 +284,7 @@ curl 'http://router.project-osrm.org/table/v1/driving/13.388860,52.517037;13.397
   the i-th waypoint to the j-th waypoint. Values are given in meters. Can be `null` if no route between `i` and `j` can be found. Note that computing the `distances` table is currently only implemented for CH. If `annotations=distance` or `annotations=duration,distance` is requested when running a MLD router, a `NotImplemented` error will be returned.
 - `sources` array of `Waypoint` objects describing all sources in order
 - `destinations` array of `Waypoint` objects describing all destinations in order
-- `estimated_cells` (optional) array of arrays containing `i,j` pairs indicating which cells contain estimated values based on `fallback_speed`.  Will be absent if `fallback_speed` is not used.
+- `fallback_speed_cells` (optional) array of arrays containing `i,j` pairs indicating which cells contain estimated values based on `fallback_speed`.  Will be absent if `fallback_speed` is not used.
 
 In case of error the following `code`s are supported in addition to the general ones:
 
@@ -386,7 +386,7 @@ All other properties might be undefined.
       0
     ]
   ],
-  "estimated_cells": [
+  "fallback_speed_cells": [
     [ 0, 1 ],
     [ 1, 0 ]
   ]
diff --git a/docs/nodejs/api.md b/docs/nodejs/api.md
index 4615618ee..ba3f18bd8 100644
--- a/docs/nodejs/api.md
+++ b/docs/nodejs/api.md
@@ -157,7 +157,7 @@ Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refer
                  Values are given in seconds.
 **`sources`**: array of [`Ẁaypoint`](#waypoint) objects describing all sources in order.
 **`destinations`**: array of [`Ẁaypoint`](#waypoint) objects describing all destinations in order.
-**`estimated_cells`**: (optional) if `fallback_speed` is used, will be an array of arrays of `row,column` values, indicating which cells contain estimated values.
+**`fallback_speed_cells`**: (optional) if `fallback_speed` is used, will be an array of arrays of `row,column` values, indicating which cells contain estimated values.
 
 ### tile
 
diff --git a/features/step_definitions/distance_matrix.js b/features/step_definitions/distance_matrix.js
index e2387f3ea..594268d50 100644
--- a/features/step_definitions/distance_matrix.js
+++ b/features/step_definitions/distance_matrix.js
@@ -10,7 +10,7 @@ module.exports = function () {
 
     this.When(durationsRegex, function(table, callback) {tableParse.call(this, table, DURATIONS_NO_ROUTE, 'durations', callback);}.bind(this));
     this.When(distancesRegex, function(table, callback) {tableParse.call(this, table, DISTANCES_NO_ROUTE, 'distances', callback);}.bind(this));
-    this.When(estimatesRegex, function(table, callback) {tableParse.call(this, table, DISTANCES_NO_ROUTE, 'estimated_cells', callback);}.bind(this));
+    this.When(estimatesRegex, function(table, callback) {tableParse.call(this, table, DISTANCES_NO_ROUTE, 'fallback_speed_cells', callback);}.bind(this));
 };
 
 const durationsParse = function(v) { return isNaN(parseInt(v)); };
@@ -21,7 +21,7 @@ function tableParse(table, noRoute, annotation, callback) {
 
     const parse = annotation == 'distances' ? distancesParse : (annotation == 'durations' ? durationsParse : estimatesParse);
     const params = this.queryParams;
-    params.annotations = ['durations','estimated_cells'].indexOf(annotation) !== -1 ? 'duration' : 'distance';
+    params.annotations = ['durations','fallback_speed_cells'].indexOf(annotation) !== -1 ? 'duration' : 'distance';
 
     var tableRows = table.raw();
 
@@ -65,7 +65,7 @@ function tableParse(table, noRoute, annotation, callback) {
             var json = JSON.parse(response.body);
 
             var result = {};
-            if (annotation === 'estimated_cells') {
+            if (annotation === 'fallback_speed_cells') {
                 result = table.raw().map(row => row.map(() => ''));
                 json[annotation].forEach(pair => {
                     result[pair[0]+1][pair[1]+1] = 'Y';
diff --git a/include/engine/api/table_api.hpp b/include/engine/api/table_api.hpp
index 15dd6c6f2..d9ce9ca8d 100644
--- a/include/engine/api/table_api.hpp
+++ b/include/engine/api/table_api.hpp
@@ -48,7 +48,7 @@ class TableAPI final : public BaseAPI
     virtual void
     MakeResponse(const std::pair<std::vector<EdgeDuration>, std::vector<EdgeDistance>> &tables,
                  const std::vector<PhantomNode> &phantoms,
-                 const std::vector<TableCellRef> &estimated_cells,
+                 const std::vector<TableCellRef> &fallback_speed_cells,
                  util::json::Object &response) const
     {
         auto number_of_sources = parameters.sources.size();
@@ -89,7 +89,7 @@ class TableAPI final : public BaseAPI
 
         if (parameters.fallback_speed != INVALID_FALLBACK_SPEED && parameters.fallback_speed > 0)
         {
-            response.values["estimated_cells"] = MakeEstimatesTable(estimated_cells);
+            response.values["fallback_speed_cells"] = MakeEstimatesTable(fallback_speed_cells);
         }
 
         response.values["code"] = "Ok";
@@ -179,10 +179,10 @@ class TableAPI final : public BaseAPI
     }
 
     virtual util::json::Array
-    MakeEstimatesTable(const std::vector<TableCellRef> &estimated_cells) const
+    MakeEstimatesTable(const std::vector<TableCellRef> &fallback_speed_cells) const
     {
         util::json::Array json_table;
-        std::for_each(estimated_cells.begin(), estimated_cells.end(), [&](const auto &cell) {
+        std::for_each(fallback_speed_cells.begin(), fallback_speed_cells.end(), [&](const auto &cell) {
             util::json::Array row;
             row.values.push_back(util::json::Number(cell.row));
             row.values.push_back(util::json::Number(cell.column));
diff --git a/test/nodejs/table.js b/test/nodejs/table.js
index 840c2c061..7f7fea006 100644
--- a/test/nodejs/table.js
+++ b/test/nodejs/table.js
@@ -243,7 +243,7 @@ tables.forEach(function(annotation) {
         };
         osrm.table(options, function(err, response) {
             assert.equal(response[annotation].length, 2);
-            assert.strictEqual(response.estimated_cells, undefined);
+            assert.strictEqual(response.fallback_speed_cells, undefined);
         });
     });
 
@@ -258,7 +258,7 @@ tables.forEach(function(annotation) {
         };
         osrm.table(options, function(err, response) {
             assert.equal(response[annotation].length, 2);
-            assert.equal(response['estimated_cells'].length, 0);
+            assert.equal(response['fallback_speed_cells'].length, 0);
         });
     });