diff --git a/core/detectors/rich/utils/CbmRichUtil.h b/core/detectors/rich/utils/CbmRichUtil.h
index ab6de905f75e64e269d14a9a3bdcd8aad4963ea2..aedf4ca52c98b37b6c91b61595059d0bd826f6e2 100644
--- a/core/detectors/rich/utils/CbmRichUtil.h
+++ b/core/detectors/rich/utils/CbmRichUtil.h
@@ -7,6 +7,7 @@
 
 #include <map>
 #include <vector>
+#include <stdint.h>
 
 class CbmDigiManager;
 class TClonesArray;