diff --git a/src/gallium/drivers/r600/sfn/sfn_instr_alu.cpp b/src/gallium/drivers/r600/sfn/sfn_instr_alu.cpp
index 1dbef9da139..92ba939bbbe 100644
--- a/src/gallium/drivers/r600/sfn/sfn_instr_alu.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_instr_alu.cpp
@@ -742,6 +742,10 @@ AluInstr::pin_registers()
    if (m_dest)
       m_dest->pin_to_chan();
 
+   for (auto& src : m_src) {
+      if (auto reg = src->as_register())
+         reg->pin_to_chan();
+   }
 }
 
 bool