diff --git a/ext/hbsdctl.rb/ffi.c b/ext/hbsdctl.rb/ffi.c
index ecc6adc..b831f76 100644
--- a/ext/hbsdctl.rb/ffi.c
+++ b/ext/hbsdctl.rb/ffi.c
@@ -36,10 +36,10 @@ ffi_available_features(VALUE self)
 
 
 /**
- * BSD::Control::FFI.reset!
+ * BSD::Control::FFI.sysdef!
  **/
 VALUE
-ffi_reset(VALUE self, VALUE rb_feature, VALUE rb_path)
+ffi_sysdef(VALUE self, VALUE rb_feature, VALUE rb_path)
 {
   VALUE rb_enable_flag, rb_disable_flag;
   char *enable_flag, *disable_flag, *path;
diff --git a/ext/hbsdctl.rb/hbsdctl.c b/ext/hbsdctl.rb/hbsdctl.c
index 814ba1e..9fd715a 100644
--- a/ext/hbsdctl.rb/hbsdctl.c
+++ b/ext/hbsdctl.rb/hbsdctl.c
@@ -14,7 +14,7 @@ Init_hbsdctl(void)
   rb_define_const(rb_mControl, "Enable", INT2NUM(1));
   rb_define_singleton_method(rb_mFFI, "available_features", ffi_available_features, 0);
   rb_define_singleton_method(rb_mFFI, "library_version", ffi_library_version, 0);
-  rb_define_singleton_method(rb_mFFI, "reset!", ffi_reset, 2);
+  rb_define_singleton_method(rb_mFFI, "sysdef!", ffi_sysdef, 2);
   rb_define_singleton_method(rb_mFFI, "status", ffi_status, 2);
   rb_define_private_method(rb_cFeature, "set!", feature_set, 2);
 }
diff --git a/ext/hbsdctl.rb/include/ffi.h b/ext/hbsdctl.rb/include/ffi.h
index 0337851..8111711 100644
--- a/ext/hbsdctl.rb/include/ffi.h
+++ b/ext/hbsdctl.rb/include/ffi.h
@@ -2,4 +2,4 @@
 VALUE ffi_library_version(VALUE);
 VALUE ffi_available_features(VALUE);
 VALUE ffi_status(VALUE, VALUE, VALUE);
-VALUE ffi_reset(VALUE, VALUE, VALUE);
+VALUE ffi_sysdef(VALUE, VALUE, VALUE);
diff --git a/lib/bsd/control/feature.rb b/lib/bsd/control/feature.rb
index 5ea8ab3..0d645f5 100644
--- a/lib/bsd/control/feature.rb
+++ b/lib/bsd/control/feature.rb
@@ -52,7 +52,7 @@ module BSD::Control
     # @return [Boolean]
     #  Returns true on success.
     def sysdef!(path)
-      FFI.reset!(self, path)
+      FFI.sysdef!(self, path)
     end
 
     ##