diff --git a/config.h b/config.h
index 8d39173..37d8633 100644
--- a/config.h
+++ b/config.h
@@ -8,5 +8,6 @@
 #define SLOT_RANDOMIZE true
 #define ZERO_ON_FREE true
 #define SLAB_CANARY true
+#define GUARD_SIZE_DIVISOR 2
 
 #endif
diff --git a/malloc.c b/malloc.c
index b5bbf1f..090ddd4 100644
--- a/malloc.c
+++ b/malloc.c
@@ -729,7 +729,7 @@ COLD __attribute__((constructor(101))) static void trigger_early_init(void) {
 }
 
 static size_t get_guard_size(struct random_state *state, size_t size) {
-    return (get_random_u64_uniform(state, size / PAGE_SIZE / 2) + 1) * PAGE_SIZE;
+    return (get_random_u64_uniform(state, size / PAGE_SIZE / GUARD_SIZE_DIVISOR) + 1) * PAGE_SIZE;
 }
 
 static void *allocate(size_t size) {