diff --git a/src/mars_patcher/mf/constants/reserved_space.py b/src/mars_patcher/mf/constants/reserved_space.py
index fdc0007..9f2222c 100644
--- a/src/mars_patcher/mf/constants/reserved_space.py
+++ b/src/mars_patcher/mf/constants/reserved_space.py
@@ -29,3 +29,4 @@ class ReservedConstantsMF:
     REVEAL_HIDDEN_TILES_ADDR = 0x7FF02C
     TITLESCREEN_TEXT_POINTERS_POINTER_ADDR = 0x7FF030
     DEFAULT_STEREO_FLAG_POINTER_ADDR = 0x7FF034
+    INSTANT_MORPH_FLAG_POINTER_ADDR = 0x7FF038
diff --git a/src/mars_patcher/mf/misc_patches.py b/src/mars_patcher/mf/misc_patches.py
index 7cf18b6..69024d8 100644
--- a/src/mars_patcher/mf/misc_patches.py
+++ b/src/mars_patcher/mf/misc_patches.py
@@ -94,4 +94,4 @@ def apply_accessibility_patch(rom: Rom) -> None:
 
 
 def apply_instant_unmorph_patch(rom: Rom) -> None:
-    apply_patch_in_asm_path(rom, "instant_unmorph.ips")
+    rom.write_8(rom.read_ptr(ReservedConstantsMF.INSTANT_MORPH_FLAG_POINTER_ADDR), 1)