diff --git a/lib/guestfs-internal.h b/lib/guestfs-internal.h
index a6c4266ad..2ee16ea1e 100644
--- a/lib/guestfs-internal.h
+++ b/lib/guestfs-internal.h
@@ -668,6 +668,7 @@ extern int guestfs_int_set_env_runtimedir (guestfs_h *g, const char *envname, co
 extern int guestfs_int_lazy_make_tmpdir (guestfs_h *g);
 extern int guestfs_int_lazy_make_sockdir (guestfs_h *g);
 extern char *guestfs_int_make_temp_path (guestfs_h *g, const char *name, const char *extension);
+extern int guestfs_int_create_socketname (guestfs_h *g, const char *filename, char (*sockname)[UNIX_PATH_MAX]);
 extern char *guestfs_int_lazy_make_supermin_appliance_dir (guestfs_h *g);
 extern void guestfs_int_remove_tmpdir (guestfs_h *g);
 extern void guestfs_int_remove_sockdir (guestfs_h *g);
@@ -700,7 +701,6 @@ extern int guestfs_int_get_uefi (guestfs_h *g, char *const *firmwares, const cha
 extern int64_t guestfs_int_timeval_diff (const struct timeval *x, const struct timeval *y);
 extern void guestfs_int_launch_send_progress (guestfs_h *g, int perdozen);
 extern void guestfs_int_unblock_sigterm (void);
-extern int guestfs_int_create_socketname (guestfs_h *g, const char *filename, char (*sockname)[UNIX_PATH_MAX]);
 extern void guestfs_int_register_backend (const char *name, const struct backend_ops *);
 extern int guestfs_int_set_backend (guestfs_h *g, const char *method);
 extern bool guestfs_int_passt_runnable (guestfs_h *g);
diff --git a/lib/launch.c b/lib/launch.c
index 87fb10e75..b9b76e509 100644
--- a/lib/launch.c
+++ b/lib/launch.c
@@ -310,32 +310,6 @@ guestfs_impl_config (guestfs_h *g,
   return 0;
 }
 
-/**
- * Create the path for a socket with the selected filename in the
- * tmpdir.
- */
-int
-guestfs_int_create_socketname (guestfs_h *g, const char *filename,
-                               char (*sockpath)[UNIX_PATH_MAX])
-{
-  int r;
-
-  if (guestfs_int_lazy_make_sockdir (g) == -1)
-    return -1;
-
-  r = snprintf (*sockpath, UNIX_PATH_MAX, "%s/%s", g->sockdir, filename);
-  if (r >= UNIX_PATH_MAX) {
-    error (g, _("socket path too long: %s/%s"), g->sockdir, filename);
-    return -1;
-  }
-  if (r < 0) {
-    perrorf (g, _("%s"), g->sockdir);
-    return -1;
-  }
-
-  return 0;
-}
-
 /**
  * When the library is loaded, each backend calls this function to
  * register itself in a global list.
diff --git a/lib/tmpdirs.c b/lib/tmpdirs.c
index b8e19de2b..24adf98da 100644
--- a/lib/tmpdirs.c
+++ b/lib/tmpdirs.c
@@ -253,6 +253,32 @@ guestfs_int_make_temp_path (guestfs_h *g,
                         extension ? extension : "");
 }
 
+/**
+ * Create the path for a socket with the selected filename in the
+ * sockdir.
+ */
+int
+guestfs_int_create_socketname (guestfs_h *g, const char *filename,
+                               char (*sockpath)[UNIX_PATH_MAX])
+{
+  int r;
+
+  if (guestfs_int_lazy_make_sockdir (g) == -1)
+    return -1;
+
+  r = snprintf (*sockpath, UNIX_PATH_MAX, "%s/%s", g->sockdir, filename);
+  if (r >= UNIX_PATH_MAX) {
+    error (g, _("socket path too long: %s/%s"), g->sockdir, filename);
+    return -1;
+  }
+  if (r < 0) {
+    perrorf (g, _("%s"), g->sockdir);
+    return -1;
+  }
+
+  return 0;
+}
+
 /**
  * Create the supermin appliance directory under cachedir, if it does
  * not exist.