diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir.cpp
index f5b75cd111a..990feb73234 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir.cpp
@@ -214,7 +214,7 @@ ValueDef::replace(const ValueRef &repVal, bool doSet)
       set(repVal.get());
 }
 
-Value::Value()
+Value::Value() : id(-1)
 {
   join = this;
   memset(&reg, 0, sizeof(reg));