diff --git a/ext/io/event/event.c b/ext/io/event/event.c
index 190154e..040565d 100644
--- a/ext/io/event/event.c
+++ b/ext/io/event/event.c
@@ -21,17 +21,14 @@
 #include "event.h"
 #include "selector/selector.h"
 
-VALUE IO_Event = Qnil;
-VALUE IO_Event_Selector = Qnil;
-
 void Init_IO_Event(void)
 {
 #ifdef HAVE_RB_EXT_RACTOR_SAFE
 	rb_ext_ractor_safe(true);
 #endif
 	
-	IO_Event = rb_define_module_under(rb_cIO, "Event");
-	IO_Event_Selector = rb_define_module_under(IO_Event, "Selector");
+	VALUE IO_Event = rb_define_module_under(rb_cIO, "Event");
+	VALUE IO_Event_Selector = rb_define_module_under(IO_Event, "Selector");
 	
 	Init_IO_Event_Selector(IO_Event_Selector);
 	
diff --git a/ext/io/event/selector/epoll.c b/ext/io/event/selector/epoll.c
index 285cfb2..1551460 100644
--- a/ext/io/event/selector/epoll.c
+++ b/ext/io/event/selector/epoll.c
@@ -34,8 +34,6 @@ enum {
 	DEBUG = 0,
 };
 
-static VALUE IO_Event_Selector_EPoll = Qnil;
-
 enum {EPOLL_MAX_EVENTS = 64};
 
 // This represents an actual fiber waiting for a specific event.
@@ -1037,7 +1035,7 @@ VALUE IO_Event_Selector_EPoll_wakeup(VALUE self) {
 }
 
 void Init_IO_Event_Selector_EPoll(VALUE IO_Event_Selector) {
-	IO_Event_Selector_EPoll = rb_define_class_under(IO_Event_Selector, "EPoll", rb_cObject);
+	VALUE IO_Event_Selector_EPoll = rb_define_class_under(IO_Event_Selector, "EPoll", rb_cObject);
 	
 	rb_define_alloc_func(IO_Event_Selector_EPoll, IO_Event_Selector_EPoll_allocate);
 	rb_define_method(IO_Event_Selector_EPoll, "initialize", IO_Event_Selector_EPoll_initialize, 1);
diff --git a/ext/io/event/selector/kqueue.c b/ext/io/event/selector/kqueue.c
index b50f0df..c193020 100644
--- a/ext/io/event/selector/kqueue.c
+++ b/ext/io/event/selector/kqueue.c
@@ -43,8 +43,6 @@ enum {
 #define IO_EVENT_SELECTOR_KQUEUE_USE_INTERRUPT
 #endif
 
-static VALUE IO_Event_Selector_KQueue = Qnil;
-
 enum {KQUEUE_MAX_EVENTS = 64};
 
 // This represents an actual fiber waiting for a specific event.
@@ -1052,7 +1050,7 @@ VALUE IO_Event_Selector_KQueue_wakeup(VALUE self) {
 }
 
 void Init_IO_Event_Selector_KQueue(VALUE IO_Event_Selector) {
-	IO_Event_Selector_KQueue = rb_define_class_under(IO_Event_Selector, "KQueue", rb_cObject);
+	VALUE IO_Event_Selector_KQueue = rb_define_class_under(IO_Event_Selector, "KQueue", rb_cObject);
 	
 	rb_define_alloc_func(IO_Event_Selector_KQueue, IO_Event_Selector_KQueue_allocate);
 	rb_define_method(IO_Event_Selector_KQueue, "initialize", IO_Event_Selector_KQueue_initialize, 1);
diff --git a/ext/io/event/selector/uring.c b/ext/io/event/selector/uring.c
index d30060f..92a22e8 100644
--- a/ext/io/event/selector/uring.c
+++ b/ext/io/event/selector/uring.c
@@ -37,8 +37,6 @@ enum {
 	DEBUG_COMPLETION = 0,
 };
 
-static VALUE IO_Event_Selector_URing = Qnil;
-
 enum {URING_ENTRIES = 64};
 
 #pragma mark - Data Type
@@ -1094,7 +1092,7 @@ VALUE IO_Event_Selector_URing_wakeup(VALUE self) {
 #pragma mark - Native Methods
 
 void Init_IO_Event_Selector_URing(VALUE IO_Event_Selector) {
-	IO_Event_Selector_URing = rb_define_class_under(IO_Event_Selector, "URing", rb_cObject);
+	VALUE IO_Event_Selector_URing = rb_define_class_under(IO_Event_Selector, "URing", rb_cObject);
 	
 	rb_define_alloc_func(IO_Event_Selector_URing, IO_Event_Selector_URing_allocate);
 	rb_define_method(IO_Event_Selector_URing, "initialize", IO_Event_Selector_URing_initialize, 1);