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-rw-r--r--bin/sh/arith_lex.l1
1 files changed, 1 insertions, 0 deletions
diff --git a/bin/sh/arith_lex.l b/bin/sh/arith_lex.l
index aede40fd93d2..1113d2992970 100644
--- a/bin/sh/arith_lex.l
+++ b/bin/sh/arith_lex.l
@@ -55,6 +55,7 @@ int yylex(void);
#define YY_INPUT(buf,result,max) \
result = (*buf = *arith_buf++) ? 1 : YY_NULL;
#define YY_NO_UNPUT
+#define YY_NO_INPUT
%}
%%