--- a/cuneiform_src/Kern/hhh/tigerh/h/strings.h
+++ b/cuneiform_src/Kern/hhh/tigerh/h/strings.h
@@ -80,6 +80,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 
 # include "ltconfig.h"
 # include "c_types.h"
+# include "cttypes.h"
 
 struct _String;
 typedef struct _String STRING;
--- a/cuneiform_src/Kern/include/utf8-tables.h
+++ b/cuneiform_src/Kern/include/utf8-tables.h
@@ -68,7 +68,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 #endif
 
 
-const char win1250_to_utf8[][4] = {
+const unsigned char win1250_to_utf8[][4] = {
   {0, 0, 0, 0},
   {1, 0, 0, 0},
   {2, 0, 0, 0},
@@ -328,7 +328,7 @@ const char win1250_to_utf8[][4] = {
 };
 
 
-const char win1251_to_utf8[][4] = {
+const unsigned char win1251_to_utf8[][4] = {
   {0, 0, 0, 0},
   {1, 0, 0, 0},
   {2, 0, 0, 0},
@@ -587,7 +587,7 @@ const char win1251_to_utf8[][4] = {
   {209, 143, 0, 0},
 };
 
-const char win1252_to_utf8[][4] = {
+const unsigned char win1252_to_utf8[][4] = {
   {0, 0, 0, 0},
   {1, 0, 0, 0},
   {2, 0, 0, 0},
@@ -847,7 +847,7 @@ const char win1252_to_utf8[][4] = {
 };
 
 
-const char win1254_to_utf8[][4] = {
+const unsigned char win1254_to_utf8[][4] = {
   {0, 0, 0, 0},
   {1, 0, 0, 0},
   {2, 0, 0, 0},
@@ -1107,7 +1107,7 @@ const char win1254_to_utf8[][4] = {
 };
 
 
-const char win1257_to_utf8[][4] = {
+const unsigned char win1257_to_utf8[][4] = {
   {0, 0, 0, 0},
   {1, 0, 0, 0},
   {2, 0, 0, 0},
--- a/cuneiform_src/Kern/rout/src/codetables.cpp
+++ b/cuneiform_src/Kern/rout/src/codetables.cpp
@@ -937,13 +937,13 @@ CP_TO_CP tab[] = {
  * codepage.
  */
 
-const char * getUTF8Str(const unsigned char in, const int codepage) {
+const unsigned char * getUTF8Str(const unsigned char in, const int codepage) {
   switch(codepage) {
   case 1250 : return win1250_to_utf8[in];
   case 1251 : return win1251_to_utf8[in];
   case 1252 : return win1252_to_utf8[in];
   case 1254 : return win1254_to_utf8[in];
   case 1257 : return win1257_to_utf8[in];
-  default : return "?";
+  default : return (const unsigned char *) "?";
   }
 }
--- a/cuneiform_src/Kern/rout/src/rout_own.h
+++ b/cuneiform_src/Kern/rout/src/rout_own.h
@@ -458,7 +458,7 @@ Bool SetTableTextSeparators(char* s);
 void ResetCodeTables();
 Bool UpdateActiveCodeTable();
 long GetCodePage();
-const char * getUTF8Str(const unsigned char in, const int codepage);
+const unsigned char * getUTF8Str(const unsigned char in, const int codepage);
 
 //*****************************************************************
 // Rout.cpp
--- a/cuneiform_src/Kern/rout/src/text.cpp
+++ b/cuneiform_src/Kern/rout/src/text.cpp
@@ -310,7 +310,7 @@ Bool OneChar(Handle charHandle)
 				*gMemCur++ = c2;
 		}
 		else {
-			const char *utfchar;
+			const unsigned char *utfchar;
 			utfchar = getUTF8Str((char )c2, GetCodePage());
 			int i;
 			for(i=0; utfchar[i] != '\0' ;i++){