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-rw-r--r--src/src/macro_predef.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/src/macro_predef.c b/src/src/macro_predef.c
index 2b3269d90..1c93a6e03 100644
--- a/src/src/macro_predef.c
+++ b/src/src/macro_predef.c
@@ -72,7 +72,7 @@ options_from_list(optionlist * opts, unsigned nopt,
const uschar * section, uschar * group)
{
const uschar * s;
-uschar buf[64];
+uschar buf[EXIM_DRIVERNAME_MAX];
/* The 'previously-defined-substring' rule for macros in config file
lines is done thus for these builtin macros: we know that the table