diff --git a/backends/btor/btor.ys b/backends/btor/btor.ys
index bcfd65cdd..ec28245d3 100644
--- a/backends/btor/btor.ys
+++ b/backends/btor/btor.ys
@@ -1,10 +1,11 @@
 proc; 
-opt; opt_const -mux_undef; 
-#splice; 
-opt;
+opt; opt_const -mux_undef; opt;
 rename -hide;;;
 #converting pmux to mux
 techmap -share_map pmux2mux.v;;
+#explicit type conversion
+splice; opt;
+#extracting memories;
 memory_dff -wr_only; memory_collect;;
 #flatten design
 flatten;;
diff --git a/backends/btor/verilog2btor.sh b/backends/btor/verilog2btor.sh
index 972b8dfbe..870f0a28d 100755
--- a/backends/btor/verilog2btor.sh
+++ b/backends/btor/verilog2btor.sh
@@ -22,11 +22,10 @@ hierarchy -top $3;
 hierarchy -libdir $DIR; 
 hierarchy -check; 
 proc; 
-opt; opt_const -mux_undef; 
-#splice; 
-opt;
+opt; opt_const -mux_undef; opt;
 rename -hide;;;
 techmap -share_map pmux2mux.v;;
+splice; opt;
 memory_dff -wr_only;
 memory_collect;;
 flatten;;