diff --git a/mrbgems/mruby-task/mrbgem.rake b/mrbgems/mruby-task/mrbgem.rake
index 7c7b87a74..e753b3b41 100644
--- a/mrbgems/mruby-task/mrbgem.rake
+++ b/mrbgems/mruby-task/mrbgem.rake
@@ -5,4 +5,8 @@ MRuby::Gem::Specification.new('mruby-task') do |spec|
 
   # Enable task scheduler globally (required for vm.c integration)
   spec.build.defines << 'MRB_USE_TASK_SCHEDULER'
+
+  if spec.for_windows?
+    spec.linker.libraries << "winmm"
+  end
 end