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-rw-r--r--internal/complex.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/internal/complex.h b/internal/complex.h
index dc1053823d..6f63a9ebeb 100644
--- a/internal/complex.h
+++ b/internal/complex.h
@@ -17,7 +17,7 @@ struct RComplex {
VALUE imag;
};
-#define RCOMPLEX(obj) (R_CAST(RComplex)(obj))
+#define RCOMPLEX(obj) ((struct RComplex *)(obj))
/* shortcut macro for internal only */
#define RCOMPLEX_SET_REAL(cmp, r) RB_OBJ_WRITE((cmp), &RCOMPLEX(cmp)->real, (r))