diff --git a/techlibs/greenpak4/cells_sim.v b/techlibs/greenpak4/cells_sim.v
index 6c3ffcaa..6cf29fe6 100644
--- a/techlibs/greenpak4/cells_sim.v
+++ b/techlibs/greenpak4/cells_sim.v
@@ -278,9 +278,9 @@ endmodule
 
 module GP_SHREG(input nRST, input CLK, input IN, output OUTA, output OUTB);
 
-	parameter OUTA_DELAY = 1;
+	parameter OUTA_TAP = 1;
 	parameter OUTA_INVERT = 0;
-	parameter OUTB_DELAY = 1;
+	parameter OUTB_TAP = 1;
 	
 	reg[15:0] shreg = 0;
 	
@@ -294,8 +294,8 @@ module GP_SHREG(input nRST, input CLK, input IN, output OUTA, output OUTB);
 		
 	end
 	
-	assign OUTA = (OUTA_INVERT) ? ~shreg[OUTA_DELAY - 1] : shreg[OUTA_DELAY - 1];
-	assign OUTB = shreg[OUTB_DELAY - 1];
+	assign OUTA = (OUTA_INVERT) ? ~shreg[OUTA_TAP - 1] : shreg[OUTA_TAP - 1];
+	assign OUTB = shreg[OUTB_TAP - 1];
 
 endmodule