diff --git a/hal/src/fsfw_hal/linux/spi/SpiComIF.cpp b/hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
index dcf92b5d..a899a69e 100644
--- a/hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
+++ b/hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
@@ -174,6 +174,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
                                                     size_t sendLen) {
   address_t spiAddress = spiCookie->getSpiAddress();
   auto iter = spiDeviceMap.find(spiAddress);
+  std::memset(iter->second.replyBuffer.data(), 0, sendLen);
   if (iter != spiDeviceMap.end()) {
     spiCookie->assignReadBuffer(iter->second.replyBuffer.data());
   }