diff --git a/Changes b/Changes
index 0a716ad72..60f0e4534 100644
--- a/Changes
+++ b/Changes
@@ -38,6 +38,8 @@ The contributors that suggested a given feature are shown in []. Thanks!
 
 ****  Fix false unused message on __Vemumtab, msg3180. [Tobias Rosenkranz]
 
+****  Fix assertion on dotted parameter arrayed function, bug1620. [Rich Porter]
+
 
 * Verilator 4.022 2019-11-10
 
diff --git a/src/V3LinkDot.cpp b/src/V3LinkDot.cpp
index 7d70fa169..3030dadad 100644
--- a/src/V3LinkDot.cpp
+++ b/src/V3LinkDot.cpp
@@ -1942,7 +1942,9 @@ private:
         // m_curSymp is symbol table of outer expression
         // m_ds.m_dotSymp is symbol table relative to "."'s above now
         UASSERT_OBJ(m_ds.m_dotSymp, nodep, "NULL lookup symbol table");
-        UASSERT_OBJ(m_statep->forPrimary(), nodep, "ParseRefs should no longer exist");
+        // Generally resolved during Primay, but might be at param time under AstUnlinkedRef
+        UASSERT_OBJ(m_statep->forPrimary() || m_statep->forPrearray(),
+                    nodep, "ParseRefs should no longer exist");
         DotStates lastStates = m_ds;
         bool start = (m_ds.m_dotPos == DP_NONE);  // Save, as m_dotp will be changed
         if (start) {
diff --git a/test_regress/t/t_func_dotted.v b/test_regress/t/t_func_dotted.v
index df17433a9..4c985ea75 100644
--- a/test_regress/t/t_func_dotted.v
+++ b/test_regress/t/t_func_dotted.v
@@ -12,6 +12,9 @@ module t (/*AUTOARG*/
 
    ma ma0 ();
 
+   initial t.ma0.u_b[0].f(1);
+   initial t.ma0.u_b[0].f(clk);
+
    global_mod #(32'hf00d) global_cell ();
    global_mod #(32'hf22d) global_cell2 ();
 
@@ -138,3 +141,13 @@ module mc ();
       mc.checkName (mc.getName(1'b0));
    end
 endmodule
+
+module b;
+
+   function void f(bit v);
+      $display("%m");
+   endfunction : f;
+
+endmodule : b
+
+bind ma b u_b[0:1];