diff --git a/algo/CMakeLists.txt b/algo/CMakeLists.txt
index 5cc62745d1d5453ac02811af8d3ca9b86c08236a..612c11a1a5f537f078177f538ff91be607a8aa03 100644
--- a/algo/CMakeLists.txt
+++ b/algo/CMakeLists.txt
@@ -392,6 +392,7 @@ install(
     global/RecoResultsInputArchive.h
     global/RecoResultsOutputArchive.h
     global/StorableRecoResults.h
+    qa/Accumulators.h
     qa/Histogram.h
     ca/TrackingChain.h
     ca/TrackingChainConfig.h