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-rw-r--r--ext/fiddle/fiddle.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/ext/fiddle/fiddle.h b/ext/fiddle/fiddle.h
index dbad910d07..c5d7fa8016 100644
--- a/ext/fiddle/fiddle.h
+++ b/ext/fiddle/fiddle.h
@@ -2,6 +2,7 @@
#define FIDDLE_H
#include <ruby.h>
+#include <ruby/version.h>
#include <errno.h>
#if defined(_WIN32)
@@ -189,7 +190,7 @@
#define ALIGN_INT32_T ALIGN_OF(int32_t)
#define ALIGN_INT64_T ALIGN_OF(int64_t)
-#ifdef HAVE_TYPE_RB_MEMORY_VIEW_T
+#if RUBY_API_VERSION_MAJOR >= 3
# define FIDDLE_MEMORY_VIEW
#endif