diff --git a/fsfwconfig/tmtc/apid.h b/fsfwconfig/tmtc/apid.h
index 0799abc3..00aabee1 100644
--- a/fsfwconfig/tmtc/apid.h
+++ b/fsfwconfig/tmtc/apid.h
@@ -1,7 +1,7 @@
 #ifndef FSFWCONFIG_TMTC_APID_H_
 #define FSFWCONFIG_TMTC_APID_H_
 
-#include <stdint.h>
+#include <cstdint>
 
 /**
  * Application Process Definition: entity, uniquely identified by an