diff --git a/src/openrct2/core/OrcaStream.hpp b/src/openrct2/core/OrcaStream.hpp
index 5b0ec16ad4..701a4a18d9 100644
--- a/src/openrct2/core/OrcaStream.hpp
+++ b/src/openrct2/core/OrcaStream.hpp
@@ -55,7 +55,7 @@ namespace OpenRCT2
             CompressionType Compression{};
             uint64_t CompressedSize{};
             std::array<uint8_t, 8> FNV1a{};
-            uint8_t padding[20];
+            uint8_t padding[20]{};
         };
         static_assert(sizeof(Header) == 64, "Header should be 64 bytes");