diff --git a/src/nouveau/codegen/nv50_ir_emit_gv100.cpp b/src/nouveau/codegen/nv50_ir_emit_gv100.cpp
index 12295794781..1770b5fa374 100644
--- a/src/nouveau/codegen/nv50_ir_emit_gv100.cpp
+++ b/src/nouveau/codegen/nv50_ir_emit_gv100.cpp
@@ -1583,6 +1583,12 @@ CodeEmitterGV100::emitBAR()
 {
    uint8_t subop, redop = 0x00;
 
+   //XXX: ILLEGAL_INSTR_PARAM - why?
+   if (targ->getChipset() >= 0x170) {
+      emitNOP();
+      return;
+   }
+
    // 80
    //    01: DEFER_BLOCKING
    // 78:77