diff --git a/src/comp/middle/trans.rs b/src/comp/middle/trans.rs
index 0b513744bdee..2ad339685b20 100644
--- a/src/comp/middle/trans.rs
+++ b/src/comp/middle/trans.rs
@@ -4920,7 +4920,8 @@ fn trans_tag_variant(@crate_ctxt cx, ast.def_id tag_id,
 
         auto arg_ty = arg_tys.(i).ty;
         auto llargval;
-        if (ty.type_is_structural(arg_ty)) {
+        if (ty.type_is_structural(arg_ty) ||
+                ty.type_has_dynamic_size(arg_ty)) {
             llargval = llargptr;
         } else {
             llargval = bcx.build.Load(llargptr);
diff --git a/src/test/run-pass/simple-generic-tag.rs b/src/test/run-pass/simple-generic-tag.rs
new file mode 100644
index 000000000000..ba6a3242737c
--- /dev/null
+++ b/src/test/run-pass/simple-generic-tag.rs
@@ -0,0 +1,7 @@
+tag clam[T] {
+    a(T);
+}
+
+fn main() {
+}
+