diff --git a/fusee/fusee-secondary/src/kernel_patches.c b/fusee/fusee-secondary/src/kernel_patches.c
index 09065c8db..6503b67dc 100644
--- a/fusee/fusee-secondary/src/kernel_patches.c
+++ b/fusee/fusee-secondary/src/kernel_patches.c
@@ -121,8 +121,8 @@ static const kernel_info_t g_kernel_infos[] = {
         KERNEL_HOOKS(302)
     },
     {   /* 4.0.0. */
-        /* TODO */
-        .free_code_space_offset = 0,
+        .hash = {0xE6, 0xC0, 0xB7, 0xE3, 0x2F, 0xF9, 0x44, 0x51, 0xEC, 0xD5, 0x95, 0x79, 0xE3, 0x46, 0xB1, 0xDA, 0x2E, 0xD9, 0x28, 0xC6, 0xF2, 0x31, 0x4F, 0x95, 0xD8, 0xC7, 0xD5, 0xBD, 0x15, 0xD5, 0xE2, 0x5A},
+        .free_code_space_offset = 0x52890,
         KERNEL_HOOKS(400)
     },
     {   /* 5.0.0. */