diff --git a/Sources/OpenFeature/Hook.swift b/Sources/OpenFeature/Hook.swift
index 2b037f6..fcf4bff 100644
--- a/Sources/OpenFeature/Hook.swift
+++ b/Sources/OpenFeature/Hook.swift
@@ -11,7 +11,7 @@ public protocol Hook {
 
     func error<HookValue>(ctx: HookContext<HookValue>, error: Error, hints: [String: Any])
 
-    func finally<HookValue>(ctx: HookContext<HookValue>, hints: [String: Any])
+    func finally<HookValue>(ctx: HookContext<HookValue>, details: FlagEvaluationDetails<HookValue>, hints: [String: Any])
 
     func supportsFlagValueType(flagValueType: FlagValueType) -> Bool
 }
@@ -31,7 +31,7 @@ extension Hook {
         // Default implementation
     }
 
-    public func finally<HookValue>(ctx: HookContext<HookValue>, hints: [String: Any]) {
+    public func finally<HookValue>(ctx: HookContext<HookValue>, details: FlagEvaluationDetails<HookValue>, hints: [String: Any]) {
         // Default implementation
     }
 
diff --git a/Sources/OpenFeature/HookSupport.swift b/Sources/OpenFeature/HookSupport.swift
index 1f4375d..acf9455 100644
--- a/Sources/OpenFeature/HookSupport.swift
+++ b/Sources/OpenFeature/HookSupport.swift
@@ -33,10 +33,14 @@ class HookSupport {
     }
 
     func finallyHooks<T>(
-        flagValueType: FlagValueType, hookCtx: HookContext<T>, hooks: [any Hook], hints: [String: Any]
+        flagValueType: FlagValueType,
+        hookCtx: HookContext<T>,
+        details: FlagEvaluationDetails<T>,
+        hooks: [any Hook],
+        hints: [String: Any]
     ) {
         hooks
             .filter { $0.supportsFlagValueType(flagValueType: flagValueType) }
-            .forEach { $0.finally(ctx: hookCtx, hints: hints) }
+            .forEach { $0.finally(ctx: hookCtx, details: details, hints: hints) }
     }
 }
diff --git a/Sources/OpenFeature/OpenFeatureClient.swift b/Sources/OpenFeature/OpenFeatureClient.swift
index d54cdc6..30396e3 100644
--- a/Sources/OpenFeature/OpenFeatureClient.swift
+++ b/Sources/OpenFeature/OpenFeatureClient.swift
@@ -144,7 +144,7 @@ extension OpenFeatureClient {
                 flagValueType: T.flagValueType, hookCtx: hookCtx, error: error, hooks: mergedHooks, hints: hints)
         }
         hookSupport.finallyHooks(
-            flagValueType: T.flagValueType, hookCtx: hookCtx, hooks: mergedHooks, hints: hints)
+            flagValueType: T.flagValueType, hookCtx: hookCtx, details: details, hooks: mergedHooks, hints: hints)
         return details
     }
 
diff --git a/Tests/OpenFeatureTests/Helpers/BooleanHookMock.swift b/Tests/OpenFeatureTests/Helpers/BooleanHookMock.swift
index 6cd4807..dbccca7 100644
--- a/Tests/OpenFeatureTests/Helpers/BooleanHookMock.swift
+++ b/Tests/OpenFeatureTests/Helpers/BooleanHookMock.swift
@@ -38,7 +38,7 @@ class BooleanHookMock: Hook {
         self.addEval(self.prefix.isEmpty ? "error" : "\(self.prefix) error")
     }
 
-    func finally<HookValue>(ctx: HookContext<HookValue>, hints: [String: Any]) {
+    func finally<HookValue>(ctx: HookContext<HookValue>, details: FlagEvaluationDetails<HookValue>, hints: [String: Any]) {
         finallyCalled += 1
         self.addEval(self.prefix.isEmpty ? "finally" : "\(self.prefix) finally")
     }
diff --git a/Tests/OpenFeatureTests/Helpers/IntHookMock.swift b/Tests/OpenFeatureTests/Helpers/IntHookMock.swift
index 78d6623..0a5f050 100644
--- a/Tests/OpenFeatureTests/Helpers/IntHookMock.swift
+++ b/Tests/OpenFeatureTests/Helpers/IntHookMock.swift
@@ -38,7 +38,7 @@ class IntHookMock: Hook {
         self.addEval(self.prefix.isEmpty ? "error" : "\(self.prefix) error")
     }
 
-    func finally<HookValue>(ctx: HookContext<HookValue>, hints: [String: Any]) {
+    func finally<HookValue>(ctx: HookContext<HookValue>, details: FlagEvaluationDetails<HookValue>, hints: [String: Any]) {
         finallyCalled += 1
         self.addEval(self.prefix.isEmpty ? "finally" : "\(self.prefix) finally")
     }
diff --git a/Tests/OpenFeatureTests/HookSupportTests.swift b/Tests/OpenFeatureTests/HookSupportTests.swift
index 145fcf7..78a9b52 100644
--- a/Tests/OpenFeatureTests/HookSupportTests.swift
+++ b/Tests/OpenFeatureTests/HookSupportTests.swift
@@ -37,6 +37,7 @@ final class HookSupportTests: XCTestCase {
         hookSupport.finallyHooks(
             flagValueType: .boolean,
             hookCtx: hookContext,
+            details: FlagEvaluationDetails(flagKey: "", value: false),
             hooks: [hook],
             hints: [:])