diff --git a/nan_converters_43_inl.h b/nan_converters_43_inl.h
index ef483e50..41b72deb 100644
--- a/nan_converters_43_inl.h
+++ b/nan_converters_43_inl.h
@@ -25,7 +25,8 @@ X(Object)
 X(Integer)
 X(Uint32)
 X(Int32)
-#if NODE_MODULE_VERSION <= NODE_11_0_MODULE_VERSION
+// V8 <= 7.0
+#if V8_MAJOR_VERSION < 7 || (V8_MAJOR_VERSION == 7 && V8_MINOR_VERSION == 0)
 X(Boolean)
 #else
 imp::ToFactory<v8::Boolean>::return_t                                          \
@@ -50,7 +51,8 @@ X(double, Number)
 X(int64_t, Integer)
 X(uint32_t, Uint32)
 X(int32_t, Int32)
-#if NODE_MODULE_VERSION <= NODE_11_0_MODULE_VERSION
+// V8 <= 7.0
+#if V8_MAJOR_VERSION < 7 || (V8_MAJOR_VERSION == 7 && V8_MINOR_VERSION == 0)
 X(bool, Boolean)
 #else
 imp::ToFactory<bool>::return_t                                                 \
diff --git a/nan_implementation_12_inl.h b/nan_implementation_12_inl.h
index 9af2629e..8756e6ee 100644
--- a/nan_implementation_12_inl.h
+++ b/nan_implementation_12_inl.h
@@ -345,7 +345,8 @@ Factory<v8::String>::New(ExternalOneByteStringResource * value) {
 // TODO(bnoordhuis) Use isolate-based version in Node.js v12.
 Factory<v8::StringObject>::return_t
 Factory<v8::StringObject>::New(v8::Local<v8::String> value) {
-#if NODE_MODULE_VERSION > NODE_11_0_MODULE_VERSION
+// V8 > 7.0
+#if V8_MAJOR_VERSION > 7 || (V8_MAJOR_VERSION == 7 && V8_MINOR_VERSION > 0)
   return v8::StringObject::New(v8::Isolate::GetCurrent(), value).As<v8::StringObject>();
 #else
 #ifdef _MSC_VER