diff --git a/lib/cext/ABI_check.txt b/lib/cext/ABI_check.txt
index 00750edc07d6..b8626c4cff28 100644
--- a/lib/cext/ABI_check.txt
+++ b/lib/cext/ABI_check.txt
@@ -1 +1 @@
-3
+4
diff --git a/src/main/c/cext/gc.c b/src/main/c/cext/gc.c
index 703aa3657b81..f1b7d233f2d7 100644
--- a/src/main/c/cext/gc.c
+++ b/src/main/c/cext/gc.c
@@ -38,8 +38,7 @@ void rb_gc_mark_locations(const VALUE *start, const VALUE *end) {
   VALUE *value = start;
 
   while (value < end) {
-    rb_gc_mark(*value);
-    polyglot_invoke(RUBY_CEXT, "rb_gc_mark_maybe", *value);
+    rb_gc_mark_maybe(*value);
     value++;
   }
 }