diff --git a/gc.c b/gc.c
index b850d4a79a..1d7500fc10 100644
--- a/gc.c
+++ b/gc.c
@@ -4857,7 +4857,7 @@ static VALUE
 count_objects(int argc, VALUE *argv, VALUE os)
 {
     rb_objspace_t *objspace = &rb_objspace;
-    size_t counts[T_MASK+1];
+    size_t counts[T_MASK + 1] = { 0 };
     size_t freed = 0;
     size_t total = 0;
     size_t i;
@@ -4869,10 +4869,6 @@ count_objects(int argc, VALUE *argv, VALUE os)
             rb_raise(rb_eTypeError, "non-hash given");
     }
 
-    for (i = 0; i <= T_MASK; i++) {
-        counts[i] = 0;
-    }
-
     for (i = 0; i < heap_allocated_pages; i++) {
         struct heap_page *page = heap_pages_sorted[i];
         short stride = page->slot_size;