Index: pkgIndex.tcl.in
==================================================================
--- pkgIndex.tcl.in
+++ pkgIndex.tcl.in
@@ -9,6 +9,8 @@
 		set tlsTclInitScript [file join $dir tls.tcl]
 		if {[file exists $tlsTclInitScript]} {
 			source $tlsTclInitScript
 		}
 	}} $dir]
+} elseif {[package vsatisfies [package present Tcl] 8.4]} {
+	package ifneeded tls @PACKAGE_VERSION@ [list load [file join $dir tcltls.@SHOBJEXT@] Tls]
 }