diff --git a/src/fsfw/serialize/SerialBufferAdapter.cpp b/src/fsfw/serialize/SerialBufferAdapter.cpp
index c9bdcbf0..01eb76f9 100644
--- a/src/fsfw/serialize/SerialBufferAdapter.cpp
+++ b/src/fsfw/serialize/SerialBufferAdapter.cpp
@@ -130,5 +130,3 @@ template class SerialBufferAdapter<uint8_t>;
 template class SerialBufferAdapter<uint16_t>;
 template class SerialBufferAdapter<uint32_t>;
 template class SerialBufferAdapter<uint64_t>;
-template class SerialBufferAdapter<size_t>;
-
diff --git a/src/fsfw/tmtcpacket/pus/tm/PusTmCreator.h b/src/fsfw/tmtcpacket/pus/tm/PusTmCreator.h
index 19922b2f..f683b363 100644
--- a/src/fsfw/tmtcpacket/pus/tm/PusTmCreator.h
+++ b/src/fsfw/tmtcpacket/pus/tm/PusTmCreator.h
@@ -40,7 +40,7 @@ struct PusTmParams {
               size_t dataLen)
       : secHeader(service, subservice, timeStamper), adapter(data, dataLen), sourceData(&adapter) {}
   PusTmSecHeader secHeader;
-  SerialBufferAdapter<size_t> adapter;
+  SerialBufferAdapter<uint32_t> adapter;
   const SerializeIF* sourceData = nullptr;
 };