diff --git a/ChangeLog b/ChangeLog
index dffab7fc..76f8b818 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 2018-10-14  Markus Gans  <guru.mail@muenster.de>
 	* A width or height can not be negative. 
 	  For that reason the change from int to std::size_t.
+	* FString fix for 32-bit architectures
 
 2018-10-13  Markus Gans  <guru.mail@muenster.de>
 	* Avoid using dynamic_cast so that you can compile Final Cut 
diff --git a/src/fstring.cpp b/src/fstring.cpp
index b6bcf696..6fefd216 100644
--- a/src/fstring.cpp
+++ b/src/fstring.cpp
@@ -452,6 +452,15 @@ wchar_t& FString::operator [] (std::size_t pos)
   return string[pos];
 }
 
+//----------------------------------------------------------------------
+const wchar_t& FString::operator [] (std::size_t pos) const
+{
+  if ( pos >= length )
+    throw std::out_of_range("");  // Invalid index position
+
+  return string[pos];
+}
+
 //----------------------------------------------------------------------
 const FString& FString::operator () ()
 {
diff --git a/src/ftermxterminal.cpp b/src/ftermxterminal.cpp
index d2436da1..2aee3374 100644
--- a/src/ftermxterminal.cpp
+++ b/src/ftermxterminal.cpp
@@ -417,7 +417,9 @@ void FTermXTerminal::setXTermSize()
 {
   if ( term_detection->isXTerminal() )
   {
-    FTerm::putstringf (CSI "8;%lu;%lut", term_height, term_width);
+    FTerm::putstringf ( CSI "8;%lu;%lut"
+                      , uLong(term_height)
+                      , uLong(term_width) );
     std::fflush(stdout);
   }
 }
diff --git a/src/include/final/fstring.h b/src/include/final/fstring.h
index 89aedc39..10738cea 100644
--- a/src/include/final/fstring.h
+++ b/src/include/final/fstring.h
@@ -133,7 +133,12 @@ class FString
     const FString& operator >> (double&);
     const FString& operator >> (float&);
 
-    wchar_t& operator [] (std::size_t);
+    template <typename IndexT>
+    wchar_t&       operator [] (IndexT);
+    template <typename IndexT>
+    const wchar_t& operator [] (IndexT) const;
+    wchar_t&       operator [] (std::size_t);
+    const wchar_t& operator [] (std::size_t) const;
     const FString& operator () ();
 
     bool operator <  (const FString&) const;
@@ -284,6 +289,16 @@ class FString
 inline const char* FString::getClassName()
 { return "FString"; }
 
+//----------------------------------------------------------------------
+template <typename IndexT>
+inline wchar_t& FString::operator [] (IndexT pos)
+{ return string[std::size_t(pos)]; }
+
+//----------------------------------------------------------------------
+template <typename IndexT>
+inline const wchar_t& FString::operator [] (IndexT pos) const
+{ return string[std::size_t(pos)]; }
+
 //----------------------------------------------------------------------
 template <class CharT>
 inline bool FString::operator < (CharT& s) const