diff --git a/lib/libhac/include/nn/hac/delta.h b/lib/libhac/include/nn/hac/delta.h
new file mode 100644
index 0000000..0b17d08
--- /dev/null
+++ b/lib/libhac/include/nn/hac/delta.h
@@ -0,0 +1,26 @@
+#pragma once
+#include <fnd/types.h>
+#include <nn/hac/macro.h>
+
+namespace nn
+{
+namespace hac
+{
+	namespace delta
+	{
+		static const uint32_t kDeltaStructMagic = _MAKE_STRUCT_MAGIC_U32("NDV0");
+	}
+#pragma pack(push,1)
+	struct sDeltaHeader
+	{
+		le_uint32_t st_magic;
+		byte_t reserved_00[4];
+		le_uint64_t source_size;
+		le_uint64_t destination_size;
+		le_uint64_t header_size;
+		le_uint64_t body_size;
+		byte_t reserved_01[0x18];
+	};
+#pragma pack(pop)
+}
+}
diff --git a/lib/libhac/libhac.vcxproj b/lib/libhac/libhac.vcxproj
index fae1a0e..7b457ae 100644
--- a/lib/libhac/libhac.vcxproj
+++ b/lib/libhac/libhac.vcxproj
@@ -30,7 +30,7 @@
     <ClInclude Include="include\nn\hac\ApplicationControlPropertyUtils.h" />
     <ClInclude Include="include\nn\hac\cnmt.h" />
     <ClInclude Include="include\nn\hac\ContentMetaBinary.h" />
-    <ClInclude Include="include\nn\hac\elf.h" />
+    <ClInclude Include="include\nn\hac\delta.h" />
     <ClInclude Include="include\nn\hac\fac.h" />
     <ClInclude Include="include\nn\hac\FileSystemAccessControlBinary.h" />
     <ClInclude Include="include\nn\hac\HandleTableSizeEntry.h" />
diff --git a/lib/libhac/libhac.vcxproj.filters b/lib/libhac/libhac.vcxproj.filters
index 79469bc..fcc95c3 100644
--- a/lib/libhac/libhac.vcxproj.filters
+++ b/lib/libhac/libhac.vcxproj.filters
@@ -42,7 +42,7 @@
     <ClInclude Include="include\nn\hac\ContentMetaBinary.h">
       <Filter>Header Files</Filter>
     </ClInclude>
-    <ClInclude Include="include\nn\hac\elf.h">
+    <ClInclude Include="include\nn\hac\delta.h">
       <Filter>Header Files</Filter>
     </ClInclude>
     <ClInclude Include="include\nn\hac\fac.h">