diff --git a/src/scriptfile.c b/src/scriptfile.c
index b6c66b7..6a6a037 100644
--- a/src/scriptfile.c
+++ b/src/scriptfile.c
@@ -435,8 +435,13 @@
 	    si = SCRIPT_ITEM(sid);
 	    si->sn_sourced_sid = real_sid;
 	    if (new_sid)
+	    {
 		SCRIPT_ITEM(real_sid)->sn_import_autoload
 						    = si->sn_import_autoload;
+		if (si->sn_autoload_prefix != NULL)
+			SCRIPT_ITEM(real_sid)->sn_autoload_prefix =
+				vim_strsave(si->sn_autoload_prefix);
+	    }
 	}
     }
     vim_free(real_fname);
diff --git a/src/testdir/test_vim9_import.vim b/src/testdir/test_vim9_import.vim
index 3067ef6..fb309cb 100644
--- a/src/testdir/test_vim9_import.vim
+++ b/src/testdir/test_vim9_import.vim
@@ -3068,7 +3068,10 @@
     var lines =<< trim END
         vim9script
         import autoload 'bar.vim'
-        g:resultFunc = bar.Func()
+        def FooFunc(): string
+          return bar.Func()
+        enddef
+        g:resultFunc = FooFunc()
         g:resultValue = bar.value
     END
     writefile(lines, 'Xto/plugin/foo.vim')
diff --git a/src/version.c b/src/version.c
index 068c079..8b1282b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    459,
+/**/
     458,
 /**/
     457,