diff --git a/old/pkgIndex.tcl b/new/pkgIndex.tcl
index 280f627..88ca6b7 100644
--- a/old/pkgIndex.tcl
+++ b/new/pkgIndex.tcl
@@ -11,3 +11,7 @@ package ifneeded textutil::repeat   0.7   [list source [file join $dir repeat.tc
 package ifneeded textutil::string   0.8   [list source [file join $dir string.tcl]]
 package ifneeded textutil::expander 1.3.1 [list source [file join $dir expander.tcl]]
 package ifneeded textutil::wcswidth 35.0  [list source [file join $dir wcswidth.tcl]]
+
+if {![package vsatisfies [package provide Tcl] 8.5]} { return }
+
+package ifneeded textutil::patch 0.1 [list source [file join $dir patch.tcl]]