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-rw-r--r--Build/source/texk/upmendex/mendex.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/Build/source/texk/upmendex/mendex.h b/Build/source/texk/upmendex/mendex.h
index b2cda82aedf..a268727a7e3 100644
--- a/Build/source/texk/upmendex/mendex.h
+++ b/Build/source/texk/upmendex/mendex.h
@@ -90,7 +90,7 @@ void verb_printf(FILE *fp, const char *format, ...);
struct index;
void indwrite(char *filename, struct index *ind, int pagenum);
-#define multibytelen(a) ((a)<0xc2 ? 1 : ((a)<0xc2 ? -2 : ((a)<0xe0 ? 2 : ((a)<0xf0 ? 3 : ((a)<0xf5 ? 4 : -1)))))
+#define multibytelen(a) ((a)<0x80 ? 1 : ((a)<0xc2 ? -2 : ((a)<0xe0 ? 2 : ((a)<0xf0 ? 3 : ((a)<0xf5 ? 4 : -1)))))
#define is_surrogate_pair(a) (U16_IS_LEAD(*(a)) && U16_IS_TRAIL(*(a+1)))
#ifdef WIN32