diff --git a/libctru/include/3ds/types.h b/libctru/include/3ds/types.h
index fea97e6..c694db5 100644
--- a/libctru/include/3ds/types.h
+++ b/libctru/include/3ds/types.h
@@ -41,6 +41,7 @@ typedef volatile s64 vs64; ///< 64-bit volatile signed integer.
 typedef u32 Handle;                 ///< Resource handle.
 typedef s32 Result;                 ///< Function result.
 typedef void (*ThreadFunc)(void *); ///< Thread entrypoint function.
+typedef void (*voidfn)(void);
 
 /// Creates a bitmask from a bit number.
 #define BIT(n) (1U<<(n))