diff --git a/ipc/handle_win.cc b/ipc/handle_win.cc
index 5d25905..51f3f95f 100644
--- a/ipc/handle_win.cc
+++ b/ipc/handle_win.cc
@@ -48,7 +48,7 @@
 
 // static
 void ParamTraits<HandleWin>::Log(const param_type& p, std::string* l) {
-  l->append(base::StringPrintf("0x%X", p.get_handle()));
+  l->append(base::StringPrintf("0x%p", p.get_handle()));
   l->append(base::IntToString(p.get_permissions()));
 }
 
diff --git a/ipc/ipc_message_utils.cc b/ipc/ipc_message_utils.cc
index 3baf2ee..8341e51 100644
--- a/ipc/ipc_message_utils.cc
+++ b/ipc/ipc_message_utils.cc
@@ -966,7 +966,7 @@
 }
 
 void ParamTraits<HANDLE>::Log(const param_type& p, std::string* l) {
-  l->append(base::StringPrintf("0x%X", p));
+  l->append(base::StringPrintf("0x%p", p));
 }
 
 void ParamTraits<LOGFONT>::Write(Message* m, const param_type& p) {