diff --git a/include/bitsery/adapter/buffer.h b/include/bitsery/adapter/buffer.h
index 47a8678..1e05b23 100644
--- a/include/bitsery/adapter/buffer.h
+++ b/include/bitsery/adapter/buffer.h
@@ -276,8 +276,9 @@ class OutputBufferAdapter
       }
   }
 
-  void maybeResize(BITSERY_MAYBE_UNUSED size_t newOffset, std::false_type)
+  void maybeResize(size_t newOffset, std::false_type)
   {
+    static_cast<void>(newOffset);
     assert(newOffset <= _bufferSize);
   }
 
diff --git a/include/bitsery/bitsery.h b/include/bitsery/bitsery.h
index 378b3ea..b5dee9d 100644
--- a/include/bitsery/bitsery.h
+++ b/include/bitsery/bitsery.h
@@ -77,12 +77,6 @@
 #define BITSERY_UNLIKELY
 #endif
 
-#if __has_cpp_attribute(maybe_unused)
-#define BITSERY_MAYBE_UNUSED BITSERY_ATTRIBUTE(maybe_unused)
-#else
-#define BITSERY_MAYBE_UNUSED
-#endif
-
 #if __GNUC__
 #define BITSERY_NOINLINE __attribute__((noinline))
 #elif defined(_MSC_VER)
diff --git a/include/bitsery/ext/growable.h b/include/bitsery/ext/growable.h
index f6458c2..6ad948c 100644
--- a/include/bitsery/ext/growable.h
+++ b/include/bitsery/ext/growable.h
@@ -24,7 +24,7 @@
 #define BITSERY_EXT_GROWABLE_H
 
 #include "../traits/core/traits.h"
-#include <cstdint>
+#include <stdint.h>
 
 namespace bitsery {
 
diff --git a/include/bitsery/ext/std_bitset.h b/include/bitsery/ext/std_bitset.h
index f34a883..f709147 100644
--- a/include/bitsery/ext/std_bitset.h
+++ b/include/bitsery/ext/std_bitset.h
@@ -25,7 +25,7 @@
 
 #include "../traits/core/traits.h"
 #include <bitset>
-#include <cstdint>
+#include <stdint.h>
 
 namespace bitsery {
 namespace ext {