diff --git a/src/analysis/processing/qgsalgorithmrasterlayeruniquevalues.cpp b/src/analysis/processing/qgsalgorithmrasterlayeruniquevalues.cpp
index 3d711f376e6b..12ca3ce98c4c 100644
--- a/src/analysis/processing/qgsalgorithmrasterlayeruniquevalues.cpp
+++ b/src/analysis/processing/qgsalgorithmrasterlayeruniquevalues.cpp
@@ -159,6 +159,8 @@ QVariantMap QgsRasterLayerUniqueValuesReportAlgorithm::processAlgorithm( const Q
         }
       }
     }
+    if ( feedback->isCanceled() )
+      break;
   }
 
   QMap< double, qgssize > sortedUniqueValues;