diff --git a/src/algorithms/calorimetry/CalorimeterClusterRecoCoG.cc b/src/algorithms/calorimetry/CalorimeterClusterRecoCoG.cc
index a6268d1433..cbc3980b08 100644
--- a/src/algorithms/calorimetry/CalorimeterClusterRecoCoG.cc
+++ b/src/algorithms/calorimetry/CalorimeterClusterRecoCoG.cc
@@ -21,12 +21,14 @@
 #include <podio/ObjectID.h>
 #include <podio/RelationRange.h>
 #include <podio/detail/Link.h>
+#include <stdlib.h>
 #include <algorithm>
 #include <cctype>
 #include <cstddef>
 #include <limits>
 #include <map>
 #include <optional>
+#include <ranges>
 #include <tuple>
 #include <vector>
 
diff --git a/src/algorithms/calorimetry/SimCalorimeterHitProcessor.cc b/src/algorithms/calorimetry/SimCalorimeterHitProcessor.cc
index c09a601d43..e6eb644561 100644
--- a/src/algorithms/calorimetry/SimCalorimeterHitProcessor.cc
+++ b/src/algorithms/calorimetry/SimCalorimeterHitProcessor.cc
@@ -15,11 +15,13 @@
 #include <fmt/format.h>
 #include <podio/ObjectID.h>
 #include <podio/RelationRange.h>
+#include <stdlib.h>
 #include <cmath>
 #include <cstddef>
 #include <functional>
 #include <gsl/pointers>
 #include <limits>
+#include <ranges>
 #include <stdexcept>
 #include <tuple>
 #include <unordered_map>