diff --git a/ext/nokogiri/extconf.rb b/ext/nokogiri/extconf.rb
index f27088cf89..6440a7c2dd 100644
--- a/ext/nokogiri/extconf.rb
+++ b/ext/nokogiri/extconf.rb
@@ -391,7 +391,7 @@ def using_system_libraries?
   do_clean
 end
 
-if openbsd?
+if openbsd? && !using_system_libraries?
   ENV['CC'] ||= find_executable('egcc') or
     abort "Please install gcc 4.9+ from ports using `pkg_add -v gcc`"
 end