diff --git a/CHANGELOG.md b/CHANGELOG.md
index 55a88e850..9dbaa6e7a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Fixes
+
+- Fixed IL2CPP line number processor to no longer crash in Unity 2023 builds ([#1450](https://github.com/getsentry/sentry-unity/pull/1450))
+
 ### Dependencies
 
 - Bump Cocoa SDK from v8.10.0 to v8.11.0 ([#1433](https://github.com/getsentry/sentry-unity/pull/1433))
diff --git a/package-dev/Runtime/SentryInitialization.cs b/package-dev/Runtime/SentryInitialization.cs
index 7fff137de..e2d3406f5 100644
--- a/package-dev/Runtime/SentryInitialization.cs
+++ b/package-dev/Runtime/SentryInitialization.cs
@@ -140,7 +140,7 @@ private Il2CppMethods _il2CppMethods
             ;
 #else
             = new Il2CppMethods(
-                il2cpp_gchandle_get_target,
+                Il2CppGcHandleGetTargetShim,
                 Il2CppNativeStackTraceShim,
                 il2cpp_free);
 
@@ -189,10 +189,21 @@ void SwapHexByte(IntPtr buffer, Int32 offset1, Int32 offset2)
             return Marshal.PtrToStringAnsi(debugIdPtr);
         }
 
+#if UNITY_2023
+        private static IntPtr Il2CppGcHandleGetTargetShim(IntPtr gchandle) => il2cpp_gchandle_get_target(gchandle);
+
+        // Available in Unity `2013.3.12f1` (and later)
+        // Il2CppObject* il2cpp_gchandle_get_target(Il2CppGCHandle gchandle)
+        [DllImport("__Internal")]
+        private static extern IntPtr il2cpp_gchandle_get_target(IntPtr gchandle);
+#else
+        private static IntPtr Il2CppGcHandleGetTargetShim(IntPtr gchandle) => il2cpp_gchandle_get_target(gchandle.ToInt32());
+
         // Available in Unity `2019.4.34f1` (and later)
         // Il2CppObject* il2cpp_gchandle_get_target(uint32_t gchandle)
         [DllImport("__Internal")]
         private static extern IntPtr il2cpp_gchandle_get_target(int gchandle);
+#endif
 
         // Available in Unity `2019.4.34f1` (and later)
         // void il2cpp_free(void* ptr)
diff --git a/src/Sentry.Unity/ISentryUnityInfo.cs b/src/Sentry.Unity/ISentryUnityInfo.cs
index 1150bacaf..8a44c124e 100644
--- a/src/Sentry.Unity/ISentryUnityInfo.cs
+++ b/src/Sentry.Unity/ISentryUnityInfo.cs
@@ -25,7 +25,7 @@ public Il2CppMethods(
         public Il2CppFree Il2CppFree { get; }
     }
 
-    public delegate IntPtr Il2CppGcHandleGetTarget(int gchandle);
+    public delegate IntPtr Il2CppGcHandleGetTarget(IntPtr gchandle);
     public delegate void Il2CppNativeStackTrace(
         IntPtr exc,
         out IntPtr addresses,
diff --git a/src/Sentry.Unity/Il2CppEventProcessor.cs b/src/Sentry.Unity/Il2CppEventProcessor.cs
index 3df18060a..5e2ac549e 100644
--- a/src/Sentry.Unity/Il2CppEventProcessor.cs
+++ b/src/Sentry.Unity/Il2CppEventProcessor.cs
@@ -322,7 +322,7 @@ private NativeStackTrace GetNativeStackTrace(Exception e)
             var addresses = IntPtr.Zero;
             try
             {
-                var gchandle = GCHandle.ToIntPtr(gch).ToInt32();
+                var gchandle = GCHandle.ToIntPtr(gch);
                 var addr = _il2CppMethods.Il2CppGcHandleGetTarget(gchandle);
 
                 var numFrames = 0;