diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index ed55d1b36..20d5d4954 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -6681,7 +6681,8 @@ private:
                 // child node's width to end up correct for the assignment (etc)
                 widthCheckSized(nodep, side, VN_AS(underp, NodeExpr), expDTypep, extendRule,
                                 warnOn);
-            } else if (!VN_IS(expDTypep->skipRefp(), IfaceRefDType)
+            } else if (!VN_IS(nodep, Eq) && !VN_IS(nodep, Neq)
+                       && !VN_IS(expDTypep->skipRefp(), IfaceRefDType)
                        && VN_IS(underp->dtypep()->skipRefp(), IfaceRefDType)) {
                 underp->v3error(ucfirst(nodep->prettyOperatorName())
                                 << " expected non-interface on " << side << " but "
diff --git a/test_regress/t/t_interface_virtual.out b/test_regress/t/t_interface_virtual.out
index 2e63964b4..315bffb65 100644
--- a/test_regress/t/t_interface_virtual.out
+++ b/test_regress/t/t_interface_virtual.out
@@ -1,3 +1,7 @@
+va==vb? 1
+va!=vb? 0
+va==vb? 0
+va!=vb? 1
 va.addr=aa va.data=11 ia.addr=aa ia.data=11
 vb.addr=bb vb.data=22 ib.addr=bb ib.data=22
 ca.fa.addr=a0 ca.fa.data=11 ca.fa.addr=b0 ca.fb.data=22
diff --git a/test_regress/t/t_interface_virtual.v b/test_regress/t/t_interface_virtual.v
index 0e05cf47e..2b36e1a30 100644
--- a/test_regress/t/t_interface_virtual.v
+++ b/test_regress/t/t_interface_virtual.v
@@ -33,7 +33,12 @@ module t (/*AUTOARG*/);
 
    initial begin
       va = ia;
+      vb = ia;
+      $display("va==vb? %b", va==vb);
+      $display("va!=vb? %b", va!=vb);
       vb = ib;
+      $display("va==vb? %b", va==vb);
+      $display("va!=vb? %b", va!=vb);
 
       ca = new;
       cb = new;