diff --git a/passes/hierarchy/hierarchy.cc b/passes/hierarchy/hierarchy.cc
index d27fddf1c..eea6abb04 100644
--- a/passes/hierarchy/hierarchy.cc
+++ b/passes/hierarchy/hierarchy.cc
@@ -1058,6 +1058,7 @@ struct HierarchyPass : public Pass {
 			if (tmp_top_mod != NULL) {
 				if (tmp_top_mod != top_mod){
 					top_mod = tmp_top_mod;
+					top_mod->attributes[ID::initial_top] = RTLIL::Const(1);
 					did_something = true;
 				}
 			}
diff --git a/tests/various/bug3462.ys b/tests/various/bug3462.ys
new file mode 100644
index 000000000..c85dc9470
--- /dev/null
+++ b/tests/various/bug3462.ys
@@ -0,0 +1,12 @@
+read_verilog <<EOT
+module top();
+    wire array[0:0];
+    wire out;
+    sub #(.d(1)) inst(
+        .in(array[0]),
+        .out(out)
+    );
+endmodule
+EOT
+
+hierarchy -top top -libdir .
diff --git a/tests/various/sub.v b/tests/various/sub.v
new file mode 100644
index 000000000..63422ca5c
--- /dev/null
+++ b/tests/various/sub.v
@@ -0,0 +1,3 @@
+module sub #(parameter d=1) (input in, output out);
+    assign out = in;
+endmodule