diff --git a/libctru/include/3ds/types.h b/libctru/include/3ds/types.h
index 550c0d2..88d09fc 100644
--- a/libctru/include/3ds/types.h
+++ b/libctru/include/3ds/types.h
@@ -39,7 +39,7 @@ typedef volatile s64 vs64;
 
 typedef u32 Handle;
 typedef s32 Result;
-typedef void (*ThreadFunc)(u32);
+typedef void (*ThreadFunc)(void *);
 
 #define BIT(n) (1U<<(n))