diff --git a/HeterogeneousCore/AlpakaInterface/interface/AllocatorConfig.h b/HeterogeneousCore/AlpakaInterface/interface/AllocatorConfig.h
index f8e1deedc46b6..09eb0e3274bc4 100644
--- a/HeterogeneousCore/AlpakaInterface/interface/AllocatorConfig.h
+++ b/HeterogeneousCore/AlpakaInterface/interface/AllocatorConfig.h
@@ -2,6 +2,7 @@
 #define HeterogeneousCore_AlpakaInterface_interface_AllocatorConfig_h
 
 #include <cstddef>
+#include <cstdint>
 #include <limits>
 
 namespace cms::alpakatools {