diff --git a/ext/probeprofiler/extconf.rb b/ext/probeprofiler/extconf.rb
index 1592971d4c..31cfc85c06 100644
--- a/ext/probeprofiler/extconf.rb
+++ b/ext/probeprofiler/extconf.rb
@@ -1,2 +1,2 @@
-require 'mkmf'
-create_makefile("probeprofiler")
+require 'mkmf'
+create_makefile("probeprofiler")
diff --git a/ext/probeprofiler/lib/probeprofile.rb b/ext/probeprofiler/lib/probeprofile.rb
index f5ff40d2cc..ef722b59da 100644
--- a/ext/probeprofiler/lib/probeprofile.rb
+++ b/ext/probeprofiler/lib/probeprofile.rb
@@ -1,7 +1,7 @@
-require 'probeprofiler'
-END{
-  ProbeProfiler.stop_profile
-  ProbeProfiler.print_profile
-}
-
-ProbeProfiler.start_profile
+require 'probeprofiler'
+END{
+  ProbeProfiler.stop_profile
+  ProbeProfiler.print_profile
+}
+
+ProbeProfiler.start_profile
diff --git a/ext/probeprofiler/lib/probeprofiler.rb b/ext/probeprofiler/lib/probeprofiler.rb
index e014adda2f..a00b6df653 100644
--- a/ext/probeprofiler/lib/probeprofiler.rb
+++ b/ext/probeprofiler/lib/probeprofiler.rb
@@ -1,14 +1,14 @@
-
-require 'probeprofiler.so'
-
-def ProbeProfiler.print_profile
-  data = ProbeProfiler.profile_data
-  total = 0.0
-  printf("%-60s %-8s %-7s\n", "ProbeProfile Result: Method signature", "count", "ratio")
-  data.map{|k, n| total += n; [n, k]}.sort.reverse.each{|n, sig|
-    #
-    printf("%-60s %8d %7.2f%%\n", sig, n, 100 * n / total)
-  }
-  printf("%60s %8d\n", "total:", total)
-end
-
+
+require 'probeprofiler.so'
+
+def ProbeProfiler.print_profile
+  data = ProbeProfiler.profile_data
+  total = 0.0
+  printf("%-60s %-8s %-7s\n", "ProbeProfile Result: Method signature", "count", "ratio")
+  data.map{|k, n| total += n; [n, k]}.sort.reverse.each{|n, sig|
+    #
+    printf("%-60s %8d %7.2f%%\n", sig, n, 100 * n / total)
+  }
+  printf("%60s %8d\n", "total:", total)
+end
+
diff --git a/ext/probeprofiler/probeprofiler.c b/ext/probeprofiler/probeprofiler.c
index 9d67160bc4..9d2b1a6c09 100644
--- a/ext/probeprofiler/probeprofiler.c
+++ b/ext/probeprofiler/probeprofiler.c
@@ -1,63 +1,63 @@
-#include <ruby.h>
-#include <yarvcore.h>
-
-static void
-hash_inc(VALUE data, VALUE key)
-{
-    VALUE num = INT2FIX(0);
-
-    if (num = rb_hash_aref(data, key)) {
-	num = INT2FIX(FIX2INT(num) + 1);
-    }
-
-    rb_hash_aset(data, key, num);
-}
-
-static void
-pprof_hook(rb_event_flag_t flag, VALUE data,
-	   VALUE dmyid, VALUE dmyklass)
-{
-    rb_thread_t *th = GET_THREAD();
-    VALUE sig = rb_thread_current_sig(th);
-    hash_inc(data, sig);
-}
-
-static VALUE
-pprof_data(VALUE mod)
-{
-    rb_const_get_at(mod, rb_intern("#pprof_data"));
-}
-
-static VALUE
-pprof_start(VALUE self)
-{
-    VALUE data = pprof_data(self);
-    rb_add_event_hook(pprof_hook, RUBY_EVENT_SWITCH, data);
-    return Qnil;
-}
-
-static VALUE
-pprof_stop(VALUE self)
-{
-    rb_remove_event_hook(pprof_hook);
-    return Qnil;
-}
-
-static int
-hash_to_ary_i(VALUE key, VALUE value, VALUE ary)
-{
-    rb_ary_push(ary, rb_ary_new3(2, value, key));
-    return ST_CONTINUE;
-}
-
-Init_probeprofiler(void)
-{
-    VALUE mPProf;
-
-    mPProf = rb_define_module("ProbeProfiler");
-    rb_const_set(mPProf, rb_intern("#pprof_data"), rb_hash_new());
-    rb_define_module_function(mPProf, "start_profile", pprof_start, 0);
-    rb_define_module_function(mPProf, "stop_profile", pprof_stop, 0);
-    rb_define_module_function(mPProf, "profile_data", pprof_data, 0);
-}
-
+#include <ruby.h>
+#include <yarvcore.h>
+
+static void
+hash_inc(VALUE data, VALUE key)
+{
+    VALUE num = INT2FIX(0);
+
+    if (num = rb_hash_aref(data, key)) {
+	num = INT2FIX(FIX2INT(num) + 1);
+    }
+
+    rb_hash_aset(data, key, num);
+}
+
+static void
+pprof_hook(rb_event_flag_t flag, VALUE data,
+	   VALUE dmyid, VALUE dmyklass)
+{
+    rb_thread_t *th = GET_THREAD();
+    VALUE sig = rb_thread_current_sig(th);
+    hash_inc(data, sig);
+}
+
+static VALUE
+pprof_data(VALUE mod)
+{
+    rb_const_get_at(mod, rb_intern("#pprof_data"));
+}
+
+static VALUE
+pprof_start(VALUE self)
+{
+    VALUE data = pprof_data(self);
+    rb_add_event_hook(pprof_hook, RUBY_EVENT_SWITCH, data);
+    return Qnil;
+}
+
+static VALUE
+pprof_stop(VALUE self)
+{
+    rb_remove_event_hook(pprof_hook);
+    return Qnil;
+}
+
+static int
+hash_to_ary_i(VALUE key, VALUE value, VALUE ary)
+{
+    rb_ary_push(ary, rb_ary_new3(2, value, key));
+    return ST_CONTINUE;
+}
+
+Init_probeprofiler(void)
+{
+    VALUE mPProf;
+
+    mPProf = rb_define_module("ProbeProfiler");
+    rb_const_set(mPProf, rb_intern("#pprof_data"), rb_hash_new());
+    rb_define_module_function(mPProf, "start_profile", pprof_start, 0);
+    rb_define_module_function(mPProf, "stop_profile", pprof_stop, 0);
+    rb_define_module_function(mPProf, "profile_data", pprof_data, 0);
+}
+