diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index dcbdacfdbdb..5c407231181 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -493,7 +493,7 @@ fs_visitor::emit_fragcoord_interpolation(ir_variable *ir)
    wpos.reg_offset++;
 
    /* gl_FragCoord.w: Already set up in emit_interpolation */
-   emit(fs_inst(BRW_OPCODE_MOV, wpos, this->pixel_w));
+   emit(fs_inst(BRW_OPCODE_MOV, wpos, this->wpos_w));
 
    return reg;
 }