diff --git a/compile.c b/compile.c
index 31cb3d0ae2..98004b65a0 100644
--- a/compile.c
+++ b/compile.c
@@ -8077,7 +8077,7 @@ struct ibf_dump {
 rb_iseq_t * iseq_alloc(void);
 
 struct ibf_load {
-    const ruby_aligned_char *buff;
+    const RUBY_ALIGNAS(sizeof(VALUE)) char *buff;
     const struct ibf_header *header;
     ID *id_list;     /* [id0, ...] */
     VALUE iseq_list; /* [iseq0, ...] */
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index b1d470163c..12b83cf7ab 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -950,8 +950,6 @@ enum ruby_rstring_flags {
     RSTRING_ENUM_END
 };
 
-typedef RUBY_ALIGNAS(SIZEOF_VALUE) char ruby_aligned_char;
-
 struct RString {
     struct RBasic basic;
     union {