diff --git a/papermario/include/common.h b/papermario/include/common.h
index 32247c2e4e..ede78a0a2b 100644
--- a/papermario/include/common.h
+++ b/papermario/include/common.h
@@ -2,6 +2,7 @@
 #define _COMMON_H_
 
 #include "ultra64.h"
+#include "types.h"
 #include "common_structs.h"
 #include "functions.h"
 #include "variables.h"
diff --git a/papermario/include/types.h b/papermario/include/types.h
new file mode 100644
index 0000000000..35e0c1ac19
--- /dev/null
+++ b/papermario/include/types.h
@@ -0,0 +1,11 @@
+#ifndef _TYPES_H_
+#define _TYPES_H_
+
+#define UNK_TYPE s32
+#define UNK_PTR void*
+#define UNK_RET void
+#define UNK_FUN_ARG void(*)(void)
+#define UNK_FUN_PTR(name) void(*name)(void)
+#define UNK_ARGS
+
+#endif
\ No newline at end of file