diff --git a/src/libsysprof/sysprof-proc-source.c b/src/libsysprof/sysprof-proc-source.c
index e4ae1f91..7846a029 100644
--- a/src/libsysprof/sysprof-proc-source.c
+++ b/src/libsysprof/sysprof-proc-source.c
@@ -51,7 +51,6 @@ struct _SysprofProcSource
   GObject               parent_instance;
   SysprofCaptureWriter *writer;
   GArray               *pids;
-  gint                  kallsyms_fd;
 };
 
 static void    source_iface_init (SysprofSourceInterface *iface);
@@ -407,7 +406,6 @@ sysprof_proc_source_get_process_info_cb (GObject      *object,
   g_assert (SYSPROF_IS_HELPERS (helpers));
   g_assert (G_IS_ASYNC_RESULT (result));
   g_assert (SYSPROF_IS_PROC_SOURCE (self));
-  g_assert (self->kallsyms_fd == -1);
 
   if (!sysprof_helpers_get_process_info_finish (helpers, result, &info, &error))
     {
@@ -416,14 +414,6 @@ sysprof_proc_source_get_process_info_cb (GObject      *object,
     }
 
   sysprof_proc_source_populate (self, info);
-
-  /* TODO: Make this optional? */
-  sysprof_helpers_get_proc_fd (helpers,
-                               "/proc/kallsyms",
-                               NULL,
-                               &self->kallsyms_fd,
-                               NULL);
-
   sysprof_source_emit_finished (SYSPROF_SOURCE (self));
 }
 
@@ -450,21 +440,6 @@ sysprof_proc_source_stop (SysprofSource *source)
 
   g_assert (SYSPROF_IS_PROC_SOURCE (self));
 
-  /* We opened kallsyms when starting the capture, now read it and
-   * save it to the end of the file.
-   */
-  if (self->kallsyms_fd != -1)
-    {
-      sysprof_capture_writer_add_file_fd (self->writer,
-                                          SYSPROF_CAPTURE_CURRENT_TIME,
-                                          -1,
-                                          -1,
-                                          "/proc/kallsyms",
-                                          self->kallsyms_fd);
-      close (self->kallsyms_fd);
-      self->kallsyms_fd = -1;
-    }
-
   g_clear_pointer (&self->writer, sysprof_capture_writer_unref);
 }
 
@@ -515,12 +490,6 @@ sysprof_proc_source_finalize (GObject *object)
 {
   SysprofProcSource *self = (SysprofProcSource *)object;
 
-  if (self->kallsyms_fd != -1)
-    {
-      close (self->kallsyms_fd);
-      self->kallsyms_fd = -1;
-    }
-
   g_clear_pointer (&self->writer, sysprof_capture_writer_unref);
   g_clear_pointer (&self->pids, g_array_unref);
 
@@ -539,7 +508,6 @@ static void
 sysprof_proc_source_init (SysprofProcSource *self)
 {
   self->pids = g_array_new (FALSE, FALSE, sizeof (GPid));
-  self->kallsyms_fd = -1;
 }
 
 SysprofSource *