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-rw-r--r--src/join.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/join.c b/src/join.c
index d84f62d39..b46275ec5 100644
--- a/src/join.c
+++ b/src/join.c
@@ -773,7 +773,7 @@ main (int argc, char **argv)
print_pairables = 1;
while ((optc = getopt_long_only (argc, argv, "-a:e:i1:2:o:t:v:", longopts,
- (int *) 0)) != EOF)
+ NULL)) != -1)
{
long int val;