--- a/netwerk/dns/nsHostResolver.cpp
+++ b/netwerk/dns/nsHostResolver.cpp
@@ -1433,17 +1433,19 @@ nsHostResolver::SizeOfIncludingThis(Mall
 }
 
 void
 nsHostResolver::ThreadFunc(void *arg)
 {
     LOG(("DNS lookup thread - starting execution.\n"));
 
     static nsThreadPoolNaming naming;
-    naming.SetThreadPoolName(NS_LITERAL_CSTRING("DNS Resolver"));
+    nsCString name = naming.GetNextThreadName("DNS Resolver");
+
+    PR_SetCurrentThreadName(name.BeginReading());
 
 #if defined(RES_RETRY_ON_FAILURE)
     nsResState rs;
 #endif
     nsHostResolver *resolver = (nsHostResolver *)arg;
     nsHostRecord *rec  = nullptr;
     AddrInfo *ai = nullptr;