diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_build_util.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_build_util.cpp
index 453d541934e..2fb02bb9c29 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_build_util.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_build_util.cpp
@@ -44,6 +44,8 @@ BuildUtil::init(Program *prog)
    bb = NULL;
    pos = NULL;
 
+   tail = false;
+
    memset(imms, 0, sizeof(imms));
    immCount = 0;
 }