diff --git a/include/mun_abi.h b/include/mun_abi.h
new file mode 100644
index 0000000..c7d9116
--- /dev/null
+++ b/include/mun_abi.h
@@ -0,0 +1,43 @@
+#ifndef MUN_ABI_H_
+#define MUN_ABI_H_
+
+#include <stdint.h>
+
+/** <div rustbindgen derive="PartialEq"> */
+typedef struct
+{
+    uint8_t b[16];
+} MunGuid;
+
+typedef struct
+{
+    MunGuid guid;
+    const char *name;
+} MunTypeInfo;
+
+typedef enum
+{
+    MunPrivacyPublic = 0,
+    MunPrivacyPrivate = 1
+} MunPrivacy;
+
+typedef uint8_t MunPrivacy_t;
+
+/** <div rustbindgen derive="Clone"> */
+typedef struct
+{
+    const char *name;
+    const MunTypeInfo *arg_types;
+    const MunTypeInfo *return_type;
+    const void *fn_ptr;
+    uint16_t num_arg_types;
+    MunPrivacy_t privacy;
+} MunFunctionInfo;
+
+typedef struct
+{
+    const MunFunctionInfo *functions;
+    uint32_t num_functions;
+} MunModuleInfo;
+
+#endif