diff --git a/src/event_system.c b/src/event_system.c
index 42d971e..00ea014 100644
--- a/src/event_system.c
+++ b/src/event_system.c
@@ -17,8 +17,8 @@
 #define IS_INVALID_EVENT(EV) (EV.id == 0)
 #define IS_INVALID_LISTENER(LS) (LS.id == 0 || IS_INVALID_EVENT(LS.event))
 
-#define CB_ARR_SIZE(CAPACITY) ((CAPACITY + 1) * sizeof(EventCallback *))
-#define FREE_CB_ARR_SIZE(CAPACITY) (CAPACITY * sizeof(u64 *))
+#define CB_ARR_SIZE(CAPACITY) ((CAPACITY + 1) * sizeof(EventCallback))
+#define FREE_CB_ARR_SIZE(CAPACITY) (CAPACITY * sizeof(u64))
 
 typedef struct es_internal ESInternal;
 struct es_internal {