diff --git a/bin/sh/mksyntax.c b/bin/sh/mksyntax.c
index 07e8eb7b32fe..6bd1390343c1 100644
--- a/bin/sh/mksyntax.c
+++ b/bin/sh/mksyntax.c
@@ -342,9 +342,9 @@ print(const char *name)
 static const char *macro[] = {
 	"#define is_digit(c)\t((is_type+SYNBASE)[(int)c] & ISDIGIT)",
 	"#define is_eof(c)\t((c) == PEOF)",
-	"#define is_alpha(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && (is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))",
-	"#define is_name(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && (is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))",
-	"#define is_in_name(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && (is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))",
+	"#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))",
+	"#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))",
+	"#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))",
 	"#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))",
 	NULL
 };