diff options
| -rw-r--r-- | src/charset.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/charset.h b/src/charset.h index 957cb4afdb9..44955fa3ac4 100644 --- a/src/charset.h +++ b/src/charset.h @@ -250,7 +250,7 @@ extern int charset_big5_2; /* Big5 Level 2 (Chinese Traditional) */ #define GENERIC_COMPOSITION_CHAR (GLYPH_MASK_CHAR) /* 1 if C is an ASCII character, else 0. */ -#define SINGLE_BYTE_CHAR_P(c) ((c) < 0x100) +#define SINGLE_BYTE_CHAR_P(c) ((c) >= 0 && (c) < 0x100) /* 1 if C is an composite character, else 0. */ #define COMPOSITE_CHAR_P(c) ((c) >= MIN_CHAR_COMPOSITION) |