diff --git a/src/lib/crypto/SymmetricAlgorithm.cpp b/src/lib/crypto/SymmetricAlgorithm.cpp
index 1db8f507..611d5bde 100644
--- a/src/lib/crypto/SymmetricAlgorithm.cpp
+++ b/src/lib/crypto/SymmetricAlgorithm.cpp
@@ -121,7 +121,9 @@ bool SymmetricAlgorithm::decryptUpdate(const ByteString& encryptedData, ByteStri
 	}
 
 	currentBufferSize += encryptedData.size();
-	currentAEADBuffer += encryptedData;
+	if (currentCipherMode == SymMode::GCM) {
+		currentAEADBuffer += encryptedData;
+	}
 
 	return true;
 }