diff --git a/Fw/Sm/SmSignalBuffer.cpp b/Fw/Sm/SmSignalBuffer.cpp
index 5d654649a1..66c047b520 100644
--- a/Fw/Sm/SmSignalBuffer.cpp
+++ b/Fw/Sm/SmSignalBuffer.cpp
@@ -3,7 +3,7 @@
 
 namespace Fw {
 
-    SmSignalBuffer::SmSignalBuffer(const U8 *args, FwSizeType size) : m_bufferData{} {
+    SmSignalBuffer::SmSignalBuffer(const U8 *args, Serializable::SizeType size) : m_bufferData{} {
         FW_ASSERT(args != nullptr);
         FW_ASSERT(size <= sizeof(this->m_bufferData));
         SerializeStatus stat = SerializeBufferBase::setBuff(args,static_cast<NATIVE_UINT_TYPE>(size));