diff --git a/src/libsysprof-analyze/sysprof-document.c b/src/libsysprof-analyze/sysprof-document.c
index bc2e6949..ced8e01a 100644
--- a/src/libsysprof-analyze/sysprof-document.c
+++ b/src/libsysprof-analyze/sysprof-document.c
@@ -354,9 +354,13 @@ sysprof_document_load_mountinfo (SysprofDocument *self,
 
       line[line_len] = 0;
 
-      if ((mount = sysprof_mount_new_for_mountinfo (line)))
+      if ((mount = sysprof_mount_new_for_mountinfo (self->strings, line)))
         sysprof_mount_namespace_add_mount (mount_namespace, g_steal_pointer (&mount));
     }
+
+  g_hash_table_insert (self->pid_to_mountinfo,
+                       GINT_TO_POINTER (pid),
+                       g_steal_pointer (&mount_namespace));
 }
 
 static void
diff --git a/src/libsysprof-analyze/sysprof-mount-private.h b/src/libsysprof-analyze/sysprof-mount-private.h
index 081fef17..675972d6 100644
--- a/src/libsysprof-analyze/sysprof-mount-private.h
+++ b/src/libsysprof-analyze/sysprof-mount-private.h
@@ -22,20 +22,23 @@
 
 #include <glib-object.h>
 
+#include "sysprof-strings-private.h"
+
 G_BEGIN_DECLS
 
 #define SYSPROF_TYPE_MOUNT (sysprof_mount_get_type())
 
 G_DECLARE_FINAL_TYPE (SysprofMount, sysprof_mount, SYSPROF, MOUNT, GObject)
 
-SysprofMount *sysprof_mount_new_for_mountinfo     (const char   *mountinfo);
-int           sysprof_mount_get_device_major      (SysprofMount *self);
-int           sysprof_mount_get_device_minor      (SysprofMount *self);
-const char   *sysprof_mount_get_root              (SysprofMount *self);
-const char   *sysprof_mount_get_mount_path        (SysprofMount *self);
-const char   *sysprof_mount_get_mount_source      (SysprofMount *self);
-const char   *sysprof_mount_get_filesystem_type   (SysprofMount *self);
-const char   *sysprof_mount_get_superblock_option (SysprofMount *self,
-                                                   const char   *option);
+SysprofMount *sysprof_mount_new_for_mountinfo     (SysprofStrings *strings,
+                                                   const char     *mountinfo);
+int           sysprof_mount_get_device_major      (SysprofMount   *self);
+int           sysprof_mount_get_device_minor      (SysprofMount   *self);
+const char   *sysprof_mount_get_root              (SysprofMount   *self);
+const char   *sysprof_mount_get_mount_path        (SysprofMount   *self);
+const char   *sysprof_mount_get_mount_source      (SysprofMount   *self);
+const char   *sysprof_mount_get_filesystem_type   (SysprofMount   *self);
+const char   *sysprof_mount_get_superblock_option (SysprofMount   *self,
+                                                   const char     *option);
 
 G_END_DECLS
diff --git a/src/libsysprof-analyze/sysprof-mount.c b/src/libsysprof-analyze/sysprof-mount.c
index 786bf111..4d3bdf19 100644
--- a/src/libsysprof-analyze/sysprof-mount.c
+++ b/src/libsysprof-analyze/sysprof-mount.c
@@ -149,7 +149,8 @@ sysprof_mount_init (SysprofMount *self)
 }
 
 SysprofMount *
-sysprof_mount_new_for_mountinfo (const char *mountinfo)
+sysprof_mount_new_for_mountinfo (SysprofStrings *strings,
+                                 const char     *mountinfo)
 {
   return NULL;
 }