diff --git a/Sources/OpenSwiftUI_SPI/Shims/OpenSwiftUIShims.h b/Sources/OpenSwiftUI_SPI/Shims/OpenSwiftUIShims.h
index f587ccb49..956776cb4 100644
--- a/Sources/OpenSwiftUI_SPI/Shims/OpenSwiftUIShims.h
+++ b/Sources/OpenSwiftUI_SPI/Shims/OpenSwiftUIShims.h
@@ -19,12 +19,20 @@ os_log_t openSwiftUIShimsLog(void);
 
 #define OPENSWIFTUI_SHIMS_LOG_ERROR(fmt, ...) os_log_error(openSwiftUIShimsLog(), fmt, ##__VA_ARGS__)
 
+// For a instance method, we need a class which can be access via [self class] or object_getClass(self).
+// For a class method, we need the metaclass. [self class] will return the class itself. object_getClass(self) will return the metaclass.
+// Alternatively, we can use objc_getMetaClass(class_getName([self class])) to get the metaclass.
+// In summary:
+// Always metaclass: Use `objc_getMetaClass(class_getName([self class]))`
+// Always class: Use `[self class]`
+// object_getClass(self) will return the class if self is an object and a metaclass if self is a class.
+
 #define OPENSWIFTUI_SAFE_WRAPPER_IMP(ReturnType, SelectorName, DefaultReturnValue, ...) \
     typedef ReturnType (*Func)(id, SEL, ##__VA_ARGS__); \
     SEL selector = NSSelectorFromString(SelectorName); \
     Func func = nil; \
     if ([self respondsToSelector:selector]) { \
-        IMP impl = class_getMethodImplementation([self class], selector); \
+        IMP impl = class_getMethodImplementation(object_getClass(self), selector); \
         func = (Func)impl; \
     } else { \
         OPENSWIFTUI_SHIMS_LOG_ERROR("%@ can't respond to selector %@", NSStringFromClass([self class]), NSStringFromSelector(selector)); \