diff --git a/src/crypto/SymmetricCipherSalsa20.cpp b/src/crypto/SymmetricCipherSalsa20.cpp
index d5cc48729..f9c29fa9b 100644
--- a/src/crypto/SymmetricCipherSalsa20.cpp
+++ b/src/crypto/SymmetricCipherSalsa20.cpp
@@ -24,11 +24,13 @@ SymmetricCipherSalsa20::~SymmetricCipherSalsa20()
 void SymmetricCipherSalsa20::setAlgorithm(SymmetricCipher::Algorithm algo)
 {
     Q_ASSERT(algo == SymmetricCipher::Salsa20);
+    Q_UNUSED(algo);
 }
 
 void SymmetricCipherSalsa20::setMode(SymmetricCipher::Mode mode)
 {
     Q_ASSERT(mode == SymmetricCipher::Stream);
+    Q_UNUSED(mode);
 }
 
 void SymmetricCipherSalsa20::setDirection(SymmetricCipher::Direction direction)