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-rw-r--r--encoding.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/encoding.c b/encoding.c
index ff5e488930..012d18c690 100644
--- a/encoding.c
+++ b/encoding.c
@@ -20,7 +20,7 @@
#ifndef ENC_DEBUG
#define ENC_DEBUG 0
#endif
-#define ENC_ASSERT (!ENC_DEBUG)?(void)0:assert
+#define ENC_ASSERT(expr) RUBY_ASSERT_WHEN(ENC_DEBUG, expr)
#define MUST_STRING(str) (ENC_ASSERT(RB_TYPE_P(str, T_STRING)), str)
#undef rb_ascii8bit_encindex