diff --git a/src/libsysprof-analyze/sysprof-document-frame-private.h b/src/libsysprof-analyze/sysprof-document-frame-private.h
index 6035313e..82ad8e2e 100644
--- a/src/libsysprof-analyze/sysprof-document-frame-private.h
+++ b/src/libsysprof-analyze/sysprof-document-frame-private.h
@@ -42,18 +42,6 @@ struct _SysprofDocumentFrameClass
   GObjectClass parent_class;
 };
 
-struct _SysprofDocumentMark
-{
-  SysprofDocumentFrame parent_instance;
-  double begin_fraction;
-  double end_fraction;
-};
-
-struct _SysprofDocumentMarkClass
-{
-  SysprofDocumentFrameClass parent_class;
-};
-
 SysprofDocumentFrame *_sysprof_document_frame_new (GMappedFile               *mapped,
                                                    const SysprofCaptureFrame *frame,
                                                    guint16                    frame_len,
diff --git a/src/libsysprof-analyze/sysprof-document-frame.c b/src/libsysprof-analyze/sysprof-document-frame.c
index e6f7e7dd..25af7f93 100644
--- a/src/libsysprof-analyze/sysprof-document-frame.c
+++ b/src/libsysprof-analyze/sysprof-document-frame.c
@@ -220,16 +220,6 @@ _sysprof_document_frame_new (GMappedFile               *mapped_file,
   /* loose precision here after about 71 minutes */
   self->time_offset = (guint)time_offset;
 
-  if (frame->type == SYSPROF_CAPTURE_FRAME_MARK)
-    {
-      SysprofDocumentMark *mark = (SysprofDocumentMark *)self;
-      gint64 capture_duration = end_time - begin_time;
-      gint64 duration = sysprof_document_mark_get_duration (mark);
-
-      mark->begin_fraction = time_offset / (double)capture_duration;
-      mark->end_fraction = (time_offset + duration) / (double)capture_duration;
-    }
-
   return self;
 }
 
diff --git a/src/libsysprof-analyze/sysprof-document-mark.c b/src/libsysprof-analyze/sysprof-document-mark.c
index 43c51f3a..bf7de40a 100644
--- a/src/libsysprof-analyze/sysprof-document-mark.c
+++ b/src/libsysprof-analyze/sysprof-document-mark.c
@@ -23,6 +23,17 @@
 #include "sysprof-document-frame-private.h"
 #include "sysprof-document-mark.h"
 
+struct _SysprofDocumentMark
+{
+  SysprofDocumentFrame parent_instance;
+};
+
+struct _SysprofDocumentMarkClass
+{
+  SysprofDocumentFrameClass parent_class;
+};
+
+
 enum {
   PROP_0,
   PROP_DURATION,
@@ -149,29 +160,3 @@ sysprof_document_mark_get_message (SysprofDocumentMark *self)
 
   return SYSPROF_DOCUMENT_FRAME_CSTRING (self, mark->message);
 }
-
-/**
- * sysprof_document_mark_get_time_fraction:
- * @self: a #SysprofDocumentMark
- * @begin_fraction: (out) (nullable): a location for the begin
- *   time as a fraction
- * @end_fraction: (out) (nullable): a location for the end
- *   time as a fraction
- *
- * Gets the begin/end time of the mark as a fraction between 0 and 1.
- *
- * 0 is the beginning of the capture, 1 is the end of the capture.
- */
-void
-sysprof_document_mark_get_time_fraction (SysprofDocumentMark *self,
-                                         double              *begin_fraction,
-                                         double              *end_fraction)
-{
-  g_return_if_fail (SYSPROF_IS_DOCUMENT_MARK (self));
-
-  if (begin_fraction)
-    *begin_fraction = self->begin_fraction;
-
-  if (end_fraction)
-    *end_fraction = self->end_fraction;
-}
diff --git a/src/libsysprof-analyze/sysprof-document-mark.h b/src/libsysprof-analyze/sysprof-document-mark.h
index e549f597..99bd7550 100644
--- a/src/libsysprof-analyze/sysprof-document-mark.h
+++ b/src/libsysprof-analyze/sysprof-document-mark.h
@@ -33,19 +33,15 @@ typedef struct _SysprofDocumentMark      SysprofDocumentMark;
 typedef struct _SysprofDocumentMarkClass SysprofDocumentMarkClass;
 
 SYSPROF_AVAILABLE_IN_ALL
-GType       sysprof_document_mark_get_type          (void) G_GNUC_CONST;
+GType       sysprof_document_mark_get_type     (void) G_GNUC_CONST;
 SYSPROF_AVAILABLE_IN_ALL
-gint64      sysprof_document_mark_get_duration      (SysprofDocumentMark *self);
+gint64      sysprof_document_mark_get_duration (SysprofDocumentMark *self);
 SYSPROF_AVAILABLE_IN_ALL
-const char *sysprof_document_mark_get_group         (SysprofDocumentMark *self);
+const char *sysprof_document_mark_get_group    (SysprofDocumentMark *self);
 SYSPROF_AVAILABLE_IN_ALL
-const char *sysprof_document_mark_get_name          (SysprofDocumentMark *self);
+const char *sysprof_document_mark_get_name     (SysprofDocumentMark *self);
 SYSPROF_AVAILABLE_IN_ALL
-const char *sysprof_document_mark_get_message       (SysprofDocumentMark *self);
-SYSPROF_AVAILABLE_IN_ALL
-void        sysprof_document_mark_get_time_fraction (SysprofDocumentMark *self,
-                                                     double              *begin_fraction,
-                                                     double              *end_fraction);
+const char *sysprof_document_mark_get_message  (SysprofDocumentMark *self);
 
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (SysprofDocumentMark, g_object_unref)