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-rw-r--r--include/ruby/internal/gc.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/internal/gc.h b/include/ruby/internal/gc.h
index 462f416af2..5ab3bb266e 100644
--- a/include/ruby/internal/gc.h
+++ b/include/ruby/internal/gc.h
@@ -45,7 +45,7 @@
RBIMPL_SYMBOL_EXPORT_BEGIN()
#define RUBY_REF_EDGE(s, p) offsetof(s, p)
-#define RUBY_REFS_LIST_PTR(l) (RUBY_DATA_FUNC)(l)
+#define RUBY_REFS_LIST_PTR(l) (RUBY_DATA_FUNC)(uintptr_t)(l)
#define RUBY_REF_END SIZE_MAX
#define RUBY_REFERENCES(t) static const size_t t[]
#define RUBY_REFERENCES_START(t) RUBY_REFERENCES(t) = {