diff --git a/tools/elf2uf2/elf.h b/tools/elf2uf2/elf.h
new file mode 100644
index 0000000..32e3dbb
--- /dev/null
+++ b/tools/elf2uf2/elf.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _ELF_H
+#define _ELF_H
+
+#include <stdint.h>
+
+#define ELF_MAGIC 0x464c457fu
+
+#define EM_ARM 0x28u
+
+#define EF_ARM_ABI_FLOAT_HARD 0x00000400u
+
+#define PT_LOAD 0x00000001u
+
+#pragma pack(push, 1)
+struct elf_header {
+    uint32_t    magic;
+    uint8_t     arch_class;
+    uint8_t     endianness;
+    uint8_t     version;
+    uint8_t     abi;
+    uint8_t     abi_version;
+    uint8_t     _pad[7];
+    uint16_t    type;
+    uint16_t    machine;
+    uint32_t    version2;
+};
+
+struct elf32_header {
+    struct elf_header common;
+    uint32_t    entry;
+    uint32_t    ph_offset;
+    uint32_t    sh_offset;
+    uint32_t    flags;
+    uint16_t    eh_size;
+    uint16_t    ph_entry_size;
+    uint16_t    ph_num;
+    uint16_t    sh_entry_size;
+    uint16_t    sh_num;
+    uint16_t    sh_str_index;
+};
+
+struct elf32_ph_entry {
+    uint32_t type;
+    uint32_t offset;
+    uint32_t vaddr;
+    uint32_t paddr;
+    uint32_t filez;
+    uint32_t memsz;
+    uint32_t flags;
+    uint32_t align;
+};
+#pragma pack(pop)
+
+#endif
\ No newline at end of file