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-rw-r--r--library/bignum.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/library/bignum.c b/library/bignum.c
index 6713bcbf..fdf571d2 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -198,7 +198,7 @@ int mbedtls_mpi_copy( mbedtls_mpi *X, const mbedtls_mpi *Y )
if( X == Y )
return( 0 );
- if( Y->p == NULL )
+ if( Y->n == 0 )
{
mbedtls_mpi_free( X );
return( 0 );