diff --git a/mesa_codegen.brg b/mesa_codegen.brg
index b117aff0f6b..0bfd8dae903 100644
--- a/mesa_codegen.brg
+++ b/mesa_codegen.brg
@@ -186,7 +186,7 @@ vec4: div_vec4_vec4(vec4, vec4) 1
 {
 	ir_to_mesa_emit_scalar_op1(tree, OPCODE_RCP,
 				   tree->dst_reg,
-				   tree->left->src_reg);
+				   tree->right->src_reg);
 
 	ir_to_mesa_emit_op2(tree, OPCODE_MUL,
 			    tree->dst_reg,