diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
index 19f070f44bb..8eb710446ce 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
@@ -1692,7 +1692,7 @@ private:
 
    class BindArgumentsPass : public Pass {
    public:
-      BindArgumentsPass(Converter &conv) : conv(conv) { }
+      BindArgumentsPass(Converter &conv) : conv(conv), sub(NULL) { }
 
    private:
       Converter &conv;