diff --git a/techlibs/xilinx/abc_unmap.v b/techlibs/xilinx/abc_unmap.v
index ab007dfd2..8bd0579ed 100644
--- a/techlibs/xilinx/abc_unmap.v
+++ b/techlibs/xilinx/abc_unmap.v
@@ -45,17 +45,17 @@ endmodule
 
 (* techmap_celltype = "$__ABC_DSP48E1_MULT $__ABC_DSP48E1_MULT_DPORT $__ABC_DSP48E1" *)
 module \$__ABC_DSP48E1 (
-    output [29:0] ACOUT,
-    output [17:0] BCOUT,
-    output reg CARRYCASCOUT,
-    output reg [3:0] CARRYOUT,
-    output reg MULTSIGNOUT,
-    output OVERFLOW,
-    output reg signed [47:0] P,
-    output PATTERNBDETECT,
-    output PATTERNDETECT,
-    output [47:0] PCOUT,
-    output UNDERFLOW,
+    (* techmap_autopurge *) output [29:0] ACOUT,
+    (* techmap_autopurge *) output [17:0] BCOUT,
+    (* techmap_autopurge *) output reg CARRYCASCOUT,
+    (* techmap_autopurge *) output reg [3:0] CARRYOUT,
+    (* techmap_autopurge *) output reg MULTSIGNOUT,
+    (* techmap_autopurge *) output OVERFLOW,
+    (* techmap_autopurge *) output reg signed [47:0] P,
+    (* techmap_autopurge *) output PATTERNBDETECT,
+    (* techmap_autopurge *) output PATTERNDETECT,
+    (* techmap_autopurge *) output [47:0] PCOUT,
+    (* techmap_autopurge *) output UNDERFLOW,
     (* techmap_autopurge *) input signed [29:0] A,
     (* techmap_autopurge *) input [29:0] ACIN,
     (* techmap_autopurge *) input [3:0] ALUMODE,