diff --git a/src/mesa/drivers/dri/i965/brw_vec4.h b/src/mesa/drivers/dri/i965/brw_vec4.h
index 82e91a9a503..9fb9d8a6a98 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.h
+++ b/src/mesa/drivers/dri/i965/brw_vec4.h
@@ -107,6 +107,7 @@ public:
    bool equals(const src_reg &r) const;
 
    src_reg(class vec4_visitor *v, const struct glsl_type *type);
+   src_reg(class vec4_visitor *v, const struct glsl_type *type, int size);
 
    explicit src_reg(dst_reg reg);
 
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index 473b3c53336..3c3e06026b3 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -639,6 +639,20 @@ src_reg::src_reg(class vec4_visitor *v, const struct glsl_type *type)
    this->type = brw_type_for_base_type(type);
 }
 
+src_reg::src_reg(class vec4_visitor *v, const struct glsl_type *type, int size)
+{
+   assert(size > 0);
+
+   init();
+
+   this->file = GRF;
+   this->reg = v->virtual_grf_alloc(type_size(type) * size);
+
+   this->swizzle = BRW_SWIZZLE_NOOP;
+
+   this->type = brw_type_for_base_type(type);
+}
+
 dst_reg::dst_reg(class vec4_visitor *v, const struct glsl_type *type)
 {
    init();