diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2053df7b0b8411d325685877429391f5590eb75..252641ed79f84abb99bdc224793e9482cce837cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,6 @@
-# Version 1.25 (not yet released)
+# Version 1.24.1
+
+* Fixed regression bug when only one activity data source is present.
 
 # Version 1.24
 
diff --git a/Civi/DataProcessor/ProcessorType/AbstractProcessorType.php b/Civi/DataProcessor/ProcessorType/AbstractProcessorType.php
index a195391e79e9b67cf02df8d3e6f79ba6fb8b6884..45feb280cd3e703d37083192f0b478fbc485495d 100644
--- a/Civi/DataProcessor/ProcessorType/AbstractProcessorType.php
+++ b/Civi/DataProcessor/ProcessorType/AbstractProcessorType.php
@@ -155,20 +155,15 @@ abstract class AbstractProcessorType {
    */
   public function getDataFlow() {
     if (!$this->dataflow) {
-      if (count($this->dataSources) === 1) {
-        $dataflow = $this->dataSources[0]['datasource']->getDataFlow();
+      if ($this->allSqlDataFlows) {
+        $dataflow = new CombinedSqlDataFlow();
       }
       else {
-        if ($this->allSqlDataFlows) {
-          $dataflow = new CombinedSqlDataFlow();
-        }
-        else {
-          $dataflow = new CombinedDataFlow();
-        }
-        foreach ($this->dataSources as $datasource) {
-          $dataFlowDescription = new DataFlowDescription($datasource['datasource']->getDataFlow(), $datasource['combine_specification']);
-          $dataflow->addSourceDataFlow($dataFlowDescription);
-        }
+        $dataflow = new CombinedDataFlow();
+      }
+      foreach ($this->dataSources as $datasource) {
+        $dataFlowDescription = new DataFlowDescription($datasource['datasource']->getDataFlow(), $datasource['combine_specification']);
+        $dataflow->addSourceDataFlow($dataFlowDescription);
       }
 
       if ($this->storage) {
diff --git a/info.xml b/info.xml
index 89cca4093b462ac6509247ac4e7c1afa0837b338..4cb2c156a2d2b6a2bf7c8fd212c1976bb7d060f7 100644
--- a/info.xml
+++ b/info.xml
@@ -15,7 +15,7 @@
     <url desc="Licensing">http://www.gnu.org/licenses/agpl-3.0.html</url>
   </urls>
   <releaseDate>2020-12-11</releaseDate>
-  <version>1.25-dev</version>
+  <version>1.24.1</version>
   <develStage>stable</develStage>
   <compatibility>
     <ver>4.7</ver>