diff --git a/src/OpenFOAM/containers/Lists/FixedList/FixedListI.H b/src/OpenFOAM/containers/Lists/FixedList/FixedListI.H
index 0b0daf1d7..dd3c6c654 100644
--- a/src/OpenFOAM/containers/Lists/FixedList/FixedListI.H
+++ b/src/OpenFOAM/containers/Lists/FixedList/FixedListI.H
@@ -140,10 +140,10 @@ inline void Foam::FixedList<T, Size>::checkStart(const label start) const
 template<class T, unsigned Size>
 inline void Foam::FixedList<T, Size>::checkSize(const label size) const
 {
-    if (size < 0 || unsigned(size) > Size)
+    if (unsigned(size) != Size)
     {
         FatalErrorInFunction
-            << "size " << size << " out of range 0 ... " << (Size)
+            << "size " << size << " != " << Size
             << abort(FatalError);
     }
 }
diff --git a/src/OpenFOAM/containers/Lists/FixedList/FixedListIO.C b/src/OpenFOAM/containers/Lists/FixedList/FixedListIO.C
index 2bf821a36..9119234ef 100644
--- a/src/OpenFOAM/containers/Lists/FixedList/FixedListIO.C
+++ b/src/OpenFOAM/containers/Lists/FixedList/FixedListIO.C
@@ -138,11 +138,7 @@ void Foam::FixedList<T, Size>::writeEntry(Ostream& os) const
 {
     if
     (
-        size()
-     && token::compound::isCompound
-        (
-            "List<" + word(pTraits<T>::typeName) + '>'
-        )
+        token::compound::isCompound("List<" + word(pTraits<T>::typeName) + '>')
     )
     {
         os  << word("List<" + word(pTraits<T>::typeName) + '>') << " ";