diff --git a/SilKit/include/silkit/capi/Lin.h b/SilKit/include/silkit/capi/Lin.h
index 322d48a53..fc111eef3 100644
--- a/SilKit/include/silkit/capi/Lin.h
+++ b/SilKit/include/silkit/capi/Lin.h
@@ -161,7 +161,7 @@ typedef uint8_t SilKit_LinFrameStatus;
 typedef uint8_t SilKit_LinDataLength;
 
 //! \brief If configured for reception with this value, the data length validation of incoming frames is skipped.
-const SilKit_LinDataLength SilKit_LinDataLengthUnknown = 255u;
+#define SilKit_LinDataLengthUnknown ((SilKit_LinDataLength)255)
 
 /*! \brief A LIN SilKit_LinFrame
  *
diff --git a/docs/CHANGELOG.rst b/docs/CHANGELOG.rst
index 17cfcf405..094732a20 100644
--- a/docs/CHANGELOG.rst
+++ b/docs/CHANGELOG.rst
@@ -9,6 +9,16 @@ The format is based on `Keep a Changelog (http://keepachangelog.com/en/1.0.0/) <
 [4.0.55] - Unreleased
 ---------------------
 
+Fixed
+~~~~~
+
+- **Important** ``SilKit_LinDataLengthUnknown`` in the C header ``Lin.h`` used to be a ``const`` global, which could cause
+  linker issues if the header file is used in multiple translation units in the same binary.
+
+  It has been turned into a ``#define``, like all the other constants in the C header files.
+
+  The symbol was not present in the dynamic symbol table of the ``SilKit.dll`` / ``.so``, so this change
+  does not break the ABI of the shared libraries.
 
 
 [4.0.54] - 2024-11-11