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-rw-r--r--src/lib/pubkey/rsa/rsa.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/pubkey/rsa/rsa.cpp b/src/lib/pubkey/rsa/rsa.cpp
index cfb1ae7ba..1ba4d6b25 100644
--- a/src/lib/pubkey/rsa/rsa.cpp
+++ b/src/lib/pubkey/rsa/rsa.cpp
@@ -219,7 +219,7 @@ class RSA_Private_Operation
BigInt private_op(const BigInt& m) const
{
#if defined(BOTAN_TARGET_OS_HAS_THREADS)
- auto future_j1 = std::async(std::launch::async, m_powermod_d1_p, m);
+ auto future_j1 = std::async(std::launch::async, std::ref(m_powermod_d1_p), m);
BigInt j2 = m_powermod_d2_q(m);
BigInt j1 = future_j1.get();
#else