diff --git a/mozilla/extensions/java/xpcom/nsJavaXPTCStub.cpp b/mozilla/extensions/java/xpcom/nsJavaXPTCStub.cpp
index 8ccf92de0d6..04538b175f0 100644
--- a/mozilla/extensions/java/xpcom/nsJavaXPTCStub.cpp
+++ b/mozilla/extensions/java/xpcom/nsJavaXPTCStub.cpp
@@ -200,22 +200,18 @@ nsJavaXPTCStub::QueryInterface(const nsID &aIID, void **aInstancePtr)
 PRBool
 nsJavaXPTCStub::SupportsIID(const nsID &iid)
 {
-  // Sometimes mIInfo will be null, particularly when nsJavaXPTCStub represents
-  // a custom (non-Mozilla) interface.
-  if (mIInfo) {
-    PRBool match;
-    nsCOMPtr<nsIInterfaceInfo> iter = mIInfo;
-    do
-    {
-      if (NS_SUCCEEDED(iter->IsIID(&iid, &match)) && match)
-        return PR_TRUE;
+  PRBool match;
+  nsCOMPtr<nsIInterfaceInfo> iter = mIInfo;
+  do
+  {
+    if (NS_SUCCEEDED(iter->IsIID(&iid, &match)) && match)
+      return PR_TRUE;
 
-      nsCOMPtr<nsIInterfaceInfo> parent;
-      iter->GetParent(getter_AddRefs(parent));
-      iter = parent;
-    }
-    while (iter != nsnull);
+    nsCOMPtr<nsIInterfaceInfo> parent;
+    iter->GetParent(getter_AddRefs(parent));
+    iter = parent;
   }
+  while (iter != nsnull);
 
   return PR_FALSE;
 }