diff --git a/Changelog.md b/Changelog.md
index cb77a88..1ffaae1 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## v0.7.1 - 16th April 2019
+ - [API] `list-reading-types` no longer returns an error if a device hasn't submitted any readings yet
+
 ## v0.7 - 14th April 2019
  - Added experimental heatmap time slider!
 
diff --git a/logic/Actions/ListReadingTypes.php b/logic/Actions/ListReadingTypes.php
index af21628..2643fbb 100644
--- a/logic/Actions/ListReadingTypes.php
+++ b/logic/Actions/ListReadingTypes.php
@@ -52,11 +52,7 @@ class ListReadingTypes implements IAction {
 		
 		// 1.5: Validate data from database
 		if(empty($data)) {
-			http_response_code(404);
-			header("content-type: text/plain");
-			header("x-time-taken: " . PerfFormatter::format_perf_data($start_time, $start_handle, null));
-			echo("Error: No types are currently present in the system.");
-			return false;
+			header("x-notice: No reading types found for that request");
 		}
 		
 		// 3: Serialise data