diff --git a/Changes b/Changes
index ecb9d6d99..d816b7ae3 100644
--- a/Changes
+++ b/Changes
@@ -145,6 +145,7 @@ Verilator 5.047 devel
 * Fix CMake compiler coroutine flags (#7404). [Shogo Yamazaki]
 * Fix delete inside foreach skipping elements (#7407) (#7410)
 * Fix std::randomize in parameterized-derived class (#7409) (#7416). [Yilou Wang]
+* Fix virtual interface implied comparison with null (#7421). [Alex Solomatnikov]
 
 
 Verilator 5.046 2026-02-28
diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index 6a6213471..51ce3e53b 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -8352,7 +8352,8 @@ class WidthVisitor final : public VNVisitor {
             VNRelinker linker;
             nodep->unlinkFrBack(&linker);
             AstNodeExpr* newp;
-            if (VN_IS(nodep->dtypep()->skipRefp(), ClassRefDType)) {
+            AstNodeDType* const dtypeSkipp = nodep->dtypep()->skipRefp();
+            if (VN_IS(dtypeSkipp, ClassRefDType) || VN_IS(dtypeSkipp, IfaceRefDType)) {
                 // Cannot use AstRedOr, as we may be redurcing a class handle
                 newp = new AstNeq{nodep->fileline(),
                                   new AstConst{nodep->fileline(), AstConst::Null{}},
diff --git a/test_regress/t/t_interface_virtual.v b/test_regress/t/t_interface_virtual.v
index 0bd84dc24..fca1da253 100644
--- a/test_regress/t/t_interface_virtual.v
+++ b/test_regress/t/t_interface_virtual.v
@@ -36,15 +36,19 @@ module t;
   initial begin
     if (va != null) $stop;
     if (null != va) $stop;
+    if (va) $stop;
     va = null;
     if (va != null) $stop;
     if (null != va) $stop;
+    if (va) $stop;
     va = ia;
     if (va == null) $stop;
     if (null == va) $stop;
+    if (!va) $stop;
     va = null;
     if (va != null) $stop;
     if (null != va) $stop;
+    if (va) $stop;
     va = ia;
     if (va != ia) $stop;
 
diff --git a/test_regress/t/t_interface_virtual_cond.v b/test_regress/t/t_interface_virtual_cond.v
index 5d9af886c..711b994cf 100644
--- a/test_regress/t/t_interface_virtual_cond.v
+++ b/test_regress/t/t_interface_virtual_cond.v
@@ -11,6 +11,7 @@ endinterface
 module t;
   Bus intf ();
   virtual Bus vif;
+  virtual Bus vif_arr[5];
 
   function logic get_vif(inout virtual Bus vif);
     vif = intf;
@@ -20,8 +21,17 @@ module t;
   initial begin
     if (get_vif(vif));
     while (get_vif(vif));
-    do ; while (get_vif(vif));
+    do; while (get_vif(vif));
     for (int i = 0; get_vif(vif); i++);
+
+    foreach (vif_arr[i]) begin
+      if (vif_arr[i]) begin
+        $display("vif_arr[%0d]=%p", i, vif_arr[i]);
+      end
+      else begin
+        vif_arr[i] = intf;
+      end
+    end
   end
 
 endmodule