diff --git a/lib/libmbedtls/mbedtls/library/bignum.c b/lib/libmbedtls/mbedtls/library/bignum.c
index 7094f89..1c0e675 100644
--- a/lib/libmbedtls/mbedtls/library/bignum.c
+++ b/lib/libmbedtls/mbedtls/library/bignum.c
@@ -2277,7 +2277,8 @@
             }
 
             if (count++ > 300) {
-                return MBEDTLS_ERR_MPI_NOT_ACCEPTABLE;
+                ret = MBEDTLS_ERR_MPI_NOT_ACCEPTABLE;
+                goto cleanup;
             }
 
         } while ( mbedtls_mpi_cmp_mpi( &A, &W ) >= 0 ||