diff --git a/lib/pkg-config.rb b/lib/pkg-config.rb
index 542d67c..93d9ed2 100644
--- a/lib/pkg-config.rb
+++ b/lib/pkg-config.rb
@@ -34,7 +34,8 @@ def set_override_variable(key, value)
   end
 
   def msvc?
-    /mswin/.match(RUBY_PLATFORM) and /^cl\b/.match(RbConfig::CONFIG["CC"])
+    /mswin/.match(RUBY_PLATFORM) and
+      /\A(?:clang-)?cl\b/.match(RbConfig::CONFIG["CC"])
   end
 
   def package_config(package)