diff --git a/XilinxProcessorIPLib/drivers/wdtps/data/wdtps_tapp.tcl b/XilinxProcessorIPLib/drivers/wdtps/data/wdtps_tapp.tcl
index f6ba487f..1396b801 100755
--- a/XilinxProcessorIPLib/drivers/wdtps/data/wdtps_tapp.tcl
+++ b/XilinxProcessorIPLib/drivers/wdtps/data/wdtps_tapp.tcl
@@ -91,7 +91,7 @@ proc gen_testfunc_call {swproj mhsinst} {
 
     set ipname [get_property NAME $mhsinst]
     set deviceid [hsm::utils::get_ip_param_name $mhsinst "DEVICE_ID"]
-    set stdout [get_property CONFIG.STDOUT [get_os]]
+    set stdout [get_property CONFIG.STDOUT [hsi::get_os]]
     if { $stdout == "" || $stdout == "none" } {
        set hasStdout 0
     } else {