diff --git a/src/compiler/glsl/ir.cpp b/src/compiler/glsl/ir.cpp
index 7b30de2183f..d24d98c0637 100644
--- a/src/compiler/glsl/ir.cpp
+++ b/src/compiler/glsl/ir.cpp
@@ -2025,6 +2025,7 @@ ir_variable::ir_variable(const struct glsl_type *type, const char *name,
    this->data.has_initializer = false;
    this->data.is_implicit_initializer = false;
    this->data.is_unmatched_generic_inout = false;
+   this->data.is_xfb = false;
    this->data.is_xfb_only = false;
    this->data.explicit_xfb_buffer = false;
    this->data.explicit_xfb_offset = false;