diff --git a/charon-pin b/charon-pin
index 1922211c..8dbc03bb 100644
--- a/charon-pin
+++ b/charon-pin
@@ -1,2 +1,2 @@
 # This is the commit from https://github.com/AeneasVerif/charon that should be used with this version of aeneas.
-5984bd9b25b01afad4762efc250220bb969e59d4
+8a17efc262ef3af377ab172efc865edcf1bb40ea
diff --git a/flake.lock b/flake.lock
index d8e43085..8a08ed8e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -9,11 +9,11 @@
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1735820899,
-        "narHash": "sha256-EaF0qwltokDO9joM6BNBS5WuDz8eBVwydoWCEhBhhKg=",
+        "lastModified": 1736180214,
+        "narHash": "sha256-BtyLLaWlN/b8SC/6eL0f9Imaoq71bHjAWh/ASugXxfk=",
         "owner": "aeneasverif",
         "repo": "charon",
-        "rev": "5984bd9b25b01afad4762efc250220bb969e59d4",
+        "rev": "8a17efc262ef3af377ab172efc865edcf1bb40ea",
         "type": "github"
       },
       "original": {
@@ -177,11 +177,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1735784864,
-        "narHash": "sha256-tIl5p3ueaPw7T5T1UXkLc8ISMk6Y8CI/D/rd0msf73I=",
+        "lastModified": 1736216977,
+        "narHash": "sha256-EMueGrzBpryM8mgOyoyJ7DdNRRk09ug1ggcLLp0WrCQ=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "04d5f1836721461b256ec452883362c5edc5288e",
+        "rev": "bbe7e4e7a70d235db4bbdcabbf8a2f6671881dd7",
         "type": "github"
       },
       "original": {
diff --git a/src/interp/InterpreterStatements.ml b/src/interp/InterpreterStatements.ml
index bf2a91e8..9ab06402 100644
--- a/src/interp/InterpreterStatements.ml
+++ b/src/interp/InterpreterStatements.ml
@@ -738,8 +738,7 @@ let eval_transparent_function_call_symbolic_inst (span : Meta.span)
                   let fn_ref =
                     Option.get
                       (Substitute.lookup_and_subst_trait_decl_provided_method
-                         trait_decl method_name trait_decl_ref.decl_generics
-                         func.generics)
+                         trait_decl method_name trait_ref func.generics)
                   in
                   let method_id = fn_ref.fun_id in
                   let method_def = ctx_lookup_fun_decl ctx method_id in
@@ -772,7 +771,7 @@ let eval_transparent_function_call_symbolic_inst (span : Meta.span)
               let fn_ref =
                 Option.get
                   (Substitute.lookup_and_subst_trait_decl_method trait_decl
-                     method_name trait_decl_ref.decl_generics func.generics)
+                     method_name trait_ref func.generics)
               in
               let method_id = fn_ref.fun_id in
               let generics = fn_ref.fun_generics in