diff --git a/CHANGELOG.md b/CHANGELOG.md
index 363771ebb4..71b052adef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@
 #### :bug: Bug fix
 
 - Fix: use configured Jsx module for constraining component return type. https://github.com/rescript-lang/rescript/pull/7945
+- Undeprecate `Js_OO` module since it is still used with the `@this` attribute. https://github.com/rescript-lang/rescript/pull/7955
 
 #### :memo: Documentation
 
diff --git a/packages/@rescript/runtime/Js_OO.res b/packages/@rescript/runtime/Js_OO.res
index 65f9cbc591..aba40deefa 100644
--- a/packages/@rescript/runtime/Js_OO.res
+++ b/packages/@rescript/runtime/Js_OO.res
@@ -24,52 +24,29 @@
 
 @@config({flags: ["-unboxed-types"]})
 
-@deprecated("This has been deprecated and will be removed in v13.")
 external unsafe_to_method: 'a => 'a = "%unsafe_to_method"
 
 module Callback = {
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity1<'a> = {@internal i1: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity2<'a> = {@internal i2: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity3<'a> = {@internal i3: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity4<'a> = {@internal i4: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity5<'a> = {@internal i5: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity6<'a> = {@internal i6: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity7<'a> = {@internal i7: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity8<'a> = {@internal i8: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity9<'a> = {@internal i9: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity10<'a> = {@internal i10: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity11<'a> = {@internal i11: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity12<'a> = {@internal i12: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity13<'a> = {@internal i13: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity14<'a> = {@internal i14: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity15<'a> = {@internal i15: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity16<'a> = {@internal i16: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity17<'a> = {@internal i17: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity18<'a> = {@internal i18: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity19<'a> = {@internal i19: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity20<'a> = {@internal i20: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity21<'a> = {@internal i21: 'a}
-  @deprecated("This has been deprecated and will be removed in v13.")
   type arity22<'a> = {@internal i22: 'a}
 }