diff --git a/src/libsysprof-analyze/sysprof-document-frame-private.h b/src/libsysprof-analyze/sysprof-document-frame-private.h
index f2786c1d..aadd6319 100644
--- a/src/libsysprof-analyze/sysprof-document-frame-private.h
+++ b/src/libsysprof-analyze/sysprof-document-frame-private.h
@@ -43,4 +43,38 @@ SysprofDocumentFrame *_sysprof_document_frame_new (GMappedFile               *ma
                                                    const SysprofCaptureFrame *frame,
                                                    gboolean                   needs_swap);
 
+#define SYSPROF_DOCUMENT_FRAME_GET(obj, type) \
+  ((const type *)(SYSPROF_DOCUMENT_FRAME(obj)->frame))
+
+#define SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) \
+  (SYSPROF_DOCUMENT_FRAME (obj)->needs_swap)
+
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+# define SYSPROF_DOCUMENT_FRAME_UINT16(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GUINT16_TO_LE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_INT16(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GINT16_TO_LE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_UINT32(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GUINT32_TO_LE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_INT32(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GINT32_TO_LE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_UINT64(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GUINT64_TO_LE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_INT64(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GINT64_TO_LE(val) : (val))
+#else
+# define SYSPROF_DOCUMENT_FRAME_UINT16(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GUINT16_TO_BE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_INT16(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GINT16_TO_BE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_UINT32(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GUINT32_TO_BE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_INT32(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GINT32_TO_BE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_UINT64(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GUINT64_TO_BE(val) : (val))
+# define SYSPROF_DOCUMENT_FRAME_INT64(obj, val) \
+   (SYSPROF_DOCUMENT_FRAME_NEEDS_SWAP(obj) ? GINT64_TO_BE(val) : (val))
+#endif
+
 G_END_DECLS