diff --git a/include/tvision/config.h b/include/tvision/config.h
index bea015ff..b3b09648 100644
--- a/include/tvision/config.h
+++ b/include/tvision/config.h
@@ -31,4 +31,10 @@ const int maxReplaceStrLen = 80;
 
 const int minPasteEventCount = 3;
 
+#if !defined( __BORLANDC__ )
+const int maxCharSize = 4; // A UTF-8-encoded character is up to 4 bytes long.
+#else
+const int maxCharSize = 1; // All characters are single-byte-encoded.
+#endif
+
 #endif  // __CONFIG_H
diff --git a/include/tvision/scrncell.h b/include/tvision/scrncell.h
index e2687778..575a5d90 100644
--- a/include/tvision/scrncell.h
+++ b/include/tvision/scrncell.h
@@ -90,9 +90,9 @@ inline void TCellChar::moveMultiByteChar(uint32_t mbc, bool wide)
 
 inline void TCellChar::moveMultiByteChar(TStringView mbc, bool wide)
 {
-    static_assert(sizeof(_text) >= 4, "");
+    static_assert(sizeof(_text) >= maxCharSize, "");
     memset(this, 0, sizeof(*this));
-    if (0 < mbc.size() && mbc.size() <= 4)
+    if (0 < mbc.size() && mbc.size() <= maxCharSize)
     {
         _flags |= -int(wide) & fWide;
         switch (mbc.size())
diff --git a/include/tvision/system.h b/include/tvision/system.h
index 2f48c94d..c0392e46 100644
--- a/include/tvision/system.h
+++ b/include/tvision/system.h
@@ -206,7 +206,7 @@ struct KeyDownEvent
         CharScanType charScan;
         };
     ushort controlKeyState;
-    char text[4];               // NOT null-terminated.
+    char text[maxCharSize];     // NOT null-terminated.
     uchar textLength;
 
     TStringView getText() const;
diff --git a/include/tvision/ttext.h b/include/tvision/ttext.h
index 7d33c0f6..938460b5 100644
--- a/include/tvision/ttext.h
+++ b/include/tvision/ttext.h
@@ -9,12 +9,6 @@
 #if defined( Uses_TText ) && !defined( __TText )
 #define __TText
 
-#if !defined( __BORLANDC__ )
-const int maxCharLength = 4; // Maximum length of a UTF-8 codepoint.
-#else
-const int maxCharLength = 1; // All characters are single-byte-encoded.
-#endif
-
 struct TTextMetrics
 {
     uint width;
diff --git a/source/tvision/teditor1.cpp b/source/tvision/teditor1.cpp
index 72415f5c..a71774b0 100644
--- a/source/tvision/teditor1.cpp
+++ b/source/tvision/teditor1.cpp
@@ -233,7 +233,7 @@ void TEditor::changeBounds( const TRect& bounds )
 
 TStringView TEditor::bufChars( uint P )
 {
-    static thread_local char buf[maxCharLength];
+    static thread_local char buf[maxCharSize];
     if (encoding == encSingleByte)
         {
         buf[0] = bufChar(P);
@@ -250,7 +250,7 @@ TStringView TEditor::bufChars( uint P )
 
 TStringView TEditor::prevBufChars( uint P )
 {
-    static thread_local char buf[maxCharLength];
+    static thread_local char buf[maxCharSize];
     if (encoding == encSingleByte)
         {
         buf[0] = bufChar(P - 1);
diff --git a/source/tvision/textview.cpp b/source/tvision/textview.cpp
index d70a76b1..c85ddac6 100644
--- a/source/tvision/textview.cpp
+++ b/source/tvision/textview.cpp
@@ -106,7 +106,7 @@ static void discardPossiblyTruncatedCharsAtEnd( const char (&s)[256],
     if( sLen == sizeof(s) )
         {
         sLen = 0;
-        while( sLen < sizeof(s) - (maxCharLength - 1) )
+        while( sLen < sizeof(s) - (maxCharSize - 1) )
             sLen += TText::next( TStringView( &s[sLen], sizeof(s) - sLen ) );
         }
 #else