diff --git a/common.gypi b/common.gypi
index 97510abf5bd691..ee0d276971b2f3 100644
--- a/common.gypi
+++ b/common.gypi
@@ -29,7 +29,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.5',
+    'v8_embedder_string': '-node.6',
 
     # Enable disassembler for `--print-code` v8 options
     'v8_enable_disassembler': 1,
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index f51576ed2a6132..34b4773c2f495d 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -10148,6 +10148,10 @@ const char* CodeEvent::GetCodeEventTypeName(CodeEventType code_event_type) {
       CODE_EVENTS_LIST(V)
 #undef V
   }
+  // The execution should never pass here
+  UNREACHABLE();
+  // NOTE(mmarchini): Workaround to fix a compiler failure on GCC 4.9
+  return "Unknown";
 }
 
 CodeEventHandler::CodeEventHandler(Isolate* isolate) {
diff --git a/deps/v8/src/log.cc b/deps/v8/src/log.cc
index f46f849b4d0295..fb3b4761a34e78 100644
--- a/deps/v8/src/log.cc
+++ b/deps/v8/src/log.cc
@@ -59,6 +59,10 @@ static v8::CodeEventType GetCodeEventTypeForTag(
       TAGS_LIST(V)
 #undef V
   }
+  // The execution should never pass here
+  UNREACHABLE();
+  // NOTE(mmarchini): Workaround to fix a compiler failure on GCC 4.9
+  return v8::CodeEventType::kUnknownType;
 }
 #define CALL_CODE_EVENT_HANDLER(Call) \
   if (listener_) {                    \