1 files changed, 4 insertions, 4 deletions
diff --git a/vm.c b/vm.c
index fae2b68127..f2f160b3f6 100644
--- a/vm.c
+++ b/vm.c
@@ -2383,7 +2383,7 @@ vm_memsize(const void *ptr)
 
 static const rb_data_type_t vm_data_type = {
     "VM",
-    {NULL, NULL, vm_memsize,},
+    {0, 0, vm_memsize,},
     0, 0, RUBY_TYPED_FREE_IMMEDIATELY
 };
 
@@ -3666,9 +3666,9 @@ usage_analysis_register_clear(VALUE self)
 
 #else
 
-MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_insn)(int insn)) = NULL;
-MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_operand)(int insn, int n, VALUE op)) = NULL;
-MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_register)(int reg, int isset)) = NULL;
+MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_insn)(int insn)) = 0;
+MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_operand)(int insn, int n, VALUE op)) = 0;
+MAYBE_UNUSED(static void (*ruby_vm_collect_usage_func_register)(int reg, int isset)) = 0;
 
 #endif