diff --git a/Rakefile b/Rakefile
index 3b80452..ebba575 100644
--- a/Rakefile
+++ b/Rakefile
@@ -9,7 +9,7 @@ end
 
 if RUBY_ENGINE != 'jruby'
   require 'rake/extensiontask'
-  Rake::ExtensionTask.new('erb')
+  Rake::ExtensionTask.new('erb/escape')
   task test: :compile
 end
 
diff --git a/erb.gemspec b/erb.gemspec
index 419685c..1973344 100644
--- a/erb.gemspec
+++ b/erb.gemspec
@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
     spec.platform = 'java'
   else
     spec.required_ruby_version = '>= 2.7.0'
-    spec.extensions = ['ext/erb/extconf.rb']
+    spec.extensions = ['ext/erb/escape/extconf.rb']
   end
 
   spec.add_dependency 'cgi', '>= 0.3.3'
diff --git a/ext/erb/erb.c b/ext/erb/escape/escape.c
similarity index 99%
rename from ext/erb/erb.c
rename to ext/erb/escape/escape.c
index b72c295..d9dacad 100644
--- a/ext/erb/erb.c
+++ b/ext/erb/escape/escape.c
@@ -84,7 +84,7 @@ erb_escape_html(VALUE self, VALUE str)
 }
 
 void
-Init_erb(void)
+Init_escape(void)
 {
     rb_cERB = rb_define_class("ERB", rb_cObject);
     rb_mUtil = rb_define_module_under(rb_cERB, "Util");
diff --git a/ext/erb/escape/extconf.rb b/ext/erb/escape/extconf.rb
new file mode 100644
index 0000000..9dec05f
--- /dev/null
+++ b/ext/erb/escape/extconf.rb
@@ -0,0 +1,2 @@
+require 'mkmf'
+create_makefile 'erb/escape'
diff --git a/ext/erb/extconf.rb b/ext/erb/extconf.rb
deleted file mode 100644
index 00a7e92..0000000
--- a/ext/erb/extconf.rb
+++ /dev/null
@@ -1,2 +0,0 @@
-require 'mkmf'
-create_makefile 'erb'
diff --git a/lib/erb.rb b/lib/erb.rb
index 48dcca7..e7cb160 100644
--- a/lib/erb.rb
+++ b/lib/erb.rb
@@ -1000,7 +1000,7 @@ module Util
     #
     begin
       # ERB::Util.html_escape
-      require 'erb.so'
+      require 'erb/escape'
     rescue LoadError
       def html_escape(s)
         CGI.escapeHTML(s.to_s)