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-rw-r--r--crypto/bn/bn.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/crypto/bn/bn.h b/crypto/bn/bn.h
index 21a1a3fe35c0..c4d618522e26 100644
--- a/crypto/bn/bn.h
+++ b/crypto/bn/bn.h
@@ -780,7 +780,9 @@ int RAND_pseudo_bytes(unsigned char *buf,int num);
#define bn_wcheck_size(bn, words) \
do { \
const BIGNUM *_bnum2 = (bn); \
- assert(words <= (_bnum2)->dmax && words >= (_bnum2)->top); \
+ assert((words) <= (_bnum2)->dmax && (words) >= (_bnum2)->top); \
+ /* avoid unused variable warning with NDEBUG */ \
+ (void)(_bnum2); \
} while(0)
#else /* !BN_DEBUG */