diff --git a/library/bignum.c b/library/bignum.c
index 2cc8e22..f4ab0db 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -558,11 +558,7 @@
         length++;
     } while( mbedtls_mpi_cmp_int( X, 0 ) != 0 );
 
-    if( 0 != mbedtls_platform_memmove( *p, p_end, length ) )
-    {
-        ret = MBEDTLS_ERR_MPI_ALLOC_FAILED;
-        goto cleanup;
-    }
+    MBEDTLS_MPI_CHK( mbedtls_platform_memmove( *p, p_end, length ) );
     *p += length;
 
 cleanup: