diff --git a/src/gallium/drivers/r600/sfn/sfn_instr_alu.cpp b/src/gallium/drivers/r600/sfn/sfn_instr_alu.cpp
index 263b924ce56..cfaf86e1414 100644
--- a/src/gallium/drivers/r600/sfn/sfn_instr_alu.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_instr_alu.cpp
@@ -664,7 +664,7 @@ uint8_t AluInstr::allowed_src_chan_mask() const
 }
 
 bool
-AluInstr::replace_dest(PRegister new_dest, AluInstr *move_instr)
+AluInstr::replace_dest(PRegister new_dest, UNUSED AluInstr *move_instr)
 {
    if (m_dest->equal_to(*new_dest))
       return false;