diff --git a/examples/digital/adder_Xspice.cir b/examples/digital/adder_Xspice.cir
index 4d24d75bc..e367d964d 100644
--- a/examples/digital/adder_Xspice.cir
+++ b/examples/digital/adder_Xspice.cir
@@ -62,7 +62,11 @@ X1     1  2  3  4  5  6  7  8  s0 s1 s2 s3  d0 c3 FOURBIT
 * save inputs
 *.save V(a1) V(a2) V(a3) V(a4) V(a5) V(a6) V(a7) V(a8) 
 
+*.save v(1)
+
+
 .control
+*save v(1)
 TRAN 500p 6400NS
 rusage
 display
@@ -70,14 +74,11 @@ edisplay
 * save data to input directory
 cd $inputdir 
 eprvcd 1 2 3 4 5 6 7 8 s0 s1 s2 s3 c3 > adder_x.vcd
-* plotting the vcd file with GTKWave
-if $oscompiled = 1 | $oscompiled = 8  ; MS Windows
-  shell start gtkwave adder_x.vcd --script nggtk.tcl
-else if $oscompiled = 7 ; macOS, manual tweaking required
-  shell open -a gtkwave adder_x.vcd
-else ; Linux and others
-  shell gtkwave adder_x.vcd --script nggtk.tcl &
-end
+* plotting the vcd file (e.g. with GTKWave)
+* For Windows: returns control to ngspice
+shell start gtkwave adder_x.vcd --script nggtk.tcl
+* Others
+*shell gtkwave adder_x.vcd --script nggtk.tcl &
 .endc
 
 .END