diff --git a/src/time_object.cpp b/src/time_object.cpp
index 930fe6eba..2cc7b0f34 100644
--- a/src/time_object.cpp
+++ b/src/time_object.cpp
@@ -101,7 +101,7 @@ TimeObject *TimeObject::utc(Env *env, Value year, Optional<Value> month, Optiona
     int seconds = timegm(&result->m_time);
     result->m_mode = Mode::UTC;
     result->m_integer = seconds;
-    if (subsec_arg) {
+    if (subsec_arg && !subsec_arg.value().is_nil()) {
         auto subsec = subsec_arg.value();
         if (subsec.is_integer()) {
             auto integer = subsec.integer();
diff --git a/test/natalie/time_test.rb b/test/natalie/time_test.rb
index eedf33a27..ee488d573 100644
--- a/test/natalie/time_test.rb
+++ b/test/natalie/time_test.rb
@@ -126,6 +126,14 @@ def time
         t.nsec.should == 1
       end
     end
+
+    context 'with a nil microseconds argument' do
+      it 'returns a time with no subseconds' do
+        t = Time.utc(1970, 1, 1, 0, 0, 0, nil)
+        t.should be_an_instance_of(Time)
+        t.nsec.should == 0
+      end
+    end
   end
 
   describe '#+' do