diff --git a/techlibs/xilinx/abc_xc7.box b/techlibs/xilinx/abc_xc7.box
index 7fe8a7236..273d36573 100644
--- a/techlibs/xilinx/abc_xc7.box
+++ b/techlibs/xilinx/abc_xc7.box
@@ -16,7 +16,7 @@ MUXF8 2 1 3 1
 
 # Inputs: I0 I1 I2 I3 S0 S1
 # Outputs: O
-MUXF78 3 1 6 1
+$__MUXF78 3 1 6 1
 190 193 217 223 296 273
 
 # CARRY4 + CARRY4_[ABCD]X