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-rw-r--r--contrib/btree_gist/btree_numeric.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_numeric.c b/contrib/btree_gist/btree_numeric.c
index b9da2dda2f4..5943483a65a 100644
--- a/contrib/btree_gist/btree_numeric.c
+++ b/contrib/btree_gist/btree_numeric.c
@@ -1,3 +1,5 @@
+#include <math.h>
+
#include "btree_gist.h"
#include "btree_utils_var.h"
#include "utils/builtins.h"