diff --git a/c/clang/_wrap/cursor.cpp b/c/clang/_wrap/cursor.cpp
index db550aae..c4251ce4 100644
--- a/c/clang/_wrap/cursor.cpp
+++ b/c/clang/_wrap/cursor.cpp
@@ -111,6 +111,8 @@ long long wrap_clang_getArraySize(CXType *arrayTyp) { return clang_getArraySize(
 
 void wrap_clang_Type_getNamedType(CXType *typ, CXType *namedTyp) { *namedTyp = clang_Type_getNamedType(*typ); }
 
+long long wrap_clang_Type_getSizeOf(CXType *typ) { return clang_Type_getSizeOf(*typ); }
+
 unsigned wrap_clang_Cursor_isAnonymous(CXCursor *cursor) { return clang_Cursor_isAnonymous(*cursor); }
 
 unsigned wrap_clang_Cursor_isAnonymousRecordDecl(CXCursor *cursor) {
diff --git a/c/clang/clang.go b/c/clang/clang.go
index 0f3e25f0..556b3664 100644
--- a/c/clang/clang.go
+++ b/c/clang/clang.go
@@ -2148,6 +2148,61 @@ func (t Type) NamedType() (ret Type) {
 	return
 }
 
+/**
+ * List the possible error codes for \c clang_Type_getSizeOf,
+ *   \c clang_Type_getAlignOf, \c clang_Type_getOffsetOf and
+ *   \c clang_Cursor_getOffsetOf.
+ *
+ * A value of this enumeration type can be returned if the target type is not
+ * a valid argument to sizeof, alignof or offsetof.
+ */
+type LayoutError c.Int
+
+const (
+	/**
+	 * Type is of kind CXType_Invalid.
+	 */
+	LayoutErrorInvalid LayoutError = -1
+	/**
+	 * The type is an incomplete Type.
+	 */
+	LayoutErrorIncomplete LayoutError = -2
+	/**
+	 * The type is a dependent Type.
+	 */
+	LayoutErrorDependent LayoutError = -3
+	/**
+	 * The type is not a constant size type.
+	 */
+	LayoutErrorNotConstantSize LayoutError = -4
+	/**
+	 * The Field name is not valid for this record.
+	 */
+	LayoutErrorInvalidFieldName LayoutError = -5
+	/**
+	 * The type is undeduced.
+	 */
+	LayoutErrorUndeduced LayoutError = -6
+)
+
+/**
+ * Return the size of a type in bytes as per C++[expr.sizeof] standard.
+ *
+ * If the type declaration is invalid, CXTypeLayoutError_Invalid is returned.
+ * If the type declaration is an incomplete type, CXTypeLayoutError_Incomplete
+ *   is returned.
+ * If the type declaration is a dependent type, CXTypeLayoutError_Dependent is
+ *   returned.
+ */
+// llgo:link (*Type).wrapSizeOf C.wrap_clang_Type_getSizeOf
+func (t *Type) wrapSizeOf() (ret c.LongLong) {
+	return 0
+}
+
+func (t Type) SizeOf() (ret c.LongLong) {
+	return t.wrapSizeOf()
+}
+
 /**
  * Determine whether the given cursor represents an anonymous
  * tag or namespace