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-rw-r--r--src/backend/utils/adt/int8.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/backend/utils/adt/int8.c b/src/backend/utils/adt/int8.c
index 42bb6ebe2f1..a8e22008525 100644
--- a/src/backend/utils/adt/int8.c
+++ b/src/backend/utils/adt/int8.c
@@ -14,6 +14,7 @@
#include "postgres.h"
#include <ctype.h>
+#include <float.h> /* for _isnan */
#include <limits.h>
#include <math.h>