Update typedefs used for lexing.

1 files changed, 4 insertions, 2 deletions

diff --git a/include/Sci_Position.h b/include/Sci_Position.h
index a83e2864f..1360b2dce 100644
--- a/include/Sci_Position.h
+++ b/include/Sci_Position.h
@@ -9,11 +9,13 @@
 #ifndef SCI_POSITION_H
 #define SCI_POSITION_H
 
+#include <stddef.h>
+
 // Basic signed type used throughout interface
-typedef int Sci_Position;
+typedef ptrdiff_t Sci_Position;
 
 // Unsigned variant used for ILexer::Lex and ILexer::Fold
-typedef unsigned int Sci_PositionU;
+typedef size_t Sci_PositionU;
 
 // For Sci_CharacterRange  which is defined as long to be compatible with Win32 CHARRANGE
 typedef long Sci_PositionCR;