diff --git a/ipc/ipc_message_utils.cc b/ipc/ipc_message_utils.cc
index dcbde0bc..937dddb 100644
--- a/ipc/ipc_message_utils.cc
+++ b/ipc/ipc_message_utils.cc
@@ -452,6 +452,7 @@
                                           std::string* l) {
   l->append(StringPrintf("ChannelHandle(%s", p.name.c_str()));
 #if defined(OS_POSIX)
+  l->append(", ");
   ParamTraits<base::FileDescriptor>::Log(p.socket, l);
 #endif
   l->append(")");