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-rw-r--r--contrib/pg_upgrade/controldata.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/contrib/pg_upgrade/controldata.c b/contrib/pg_upgrade/controldata.c
index bfb1ed0ec8c..5eed5ac3809 100644
--- a/contrib/pg_upgrade/controldata.c
+++ b/contrib/pg_upgrade/controldata.c
@@ -545,7 +545,7 @@ putenv2(const char *var, const char *val)
{
#ifndef WIN32
char *envstr = (char *) pg_malloc(strlen(var) +
- strlen(val) + 1);
+ strlen(val) + 2);
sprintf(envstr, "%s=%s", var, val);
putenv(envstr);