3 files changed, 15 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_gist.h b/contrib/btree_gist/btree_gist.h
index f7db9206e7c..299f2d359e8 100644
--- a/contrib/btree_gist/btree_gist.h
+++ b/contrib/btree_gist/btree_gist.h
@@ -1,3 +1,6 @@
+#ifndef __BTREE_GIST_H__
+#define __BTREE_GIST_H__
+
 #include "postgres.h"
 #include "access/gist.h"
 #include "access/itup.h"
@@ -37,3 +40,5 @@ enum gbtree_type
 Datum		gbtreekey_in(PG_FUNCTION_ARGS);
 
 Datum		gbtreekey_out(PG_FUNCTION_ARGS);
+
+#endif
diff --git a/contrib/btree_gist/btree_utils_num.h b/contrib/btree_gist/btree_utils_num.h
index 0f59342d965..b2eb5dc869a 100644
--- a/contrib/btree_gist/btree_utils_num.h
+++ b/contrib/btree_gist/btree_utils_num.h
@@ -1,3 +1,6 @@
+#ifndef __BTREE_UTILS_NUM_H__
+#define __BTREE_UTILS_NUM_H__
+
 #include "btree_gist.h"
 
 typedef char GBT_NUMKEY;
@@ -101,3 +104,5 @@ extern bool gbt_num_same(const GBT_NUMKEY * a, const GBT_NUMKEY * b,
 
 extern void gbt_num_bin_union(Datum *u, GBT_NUMKEY * e,
 				  const gbtree_ninfo * tinfo);
+
+#endif
diff --git a/contrib/btree_gist/btree_utils_var.h b/contrib/btree_gist/btree_utils_var.h
index cddfadfab1f..21a6cbd8e27 100644
--- a/contrib/btree_gist/btree_utils_var.h
+++ b/contrib/btree_gist/btree_utils_var.h
@@ -1,3 +1,6 @@
+#ifndef __BTREE_UTILS_VAR_H__
+#define __BTREE_UTILS_VAR_H__
+
 #include "mb/pg_wchar.h"
 
 #include "btree_gist.h"
@@ -70,3 +73,5 @@ extern GIST_SPLITVEC *gbt_var_picksplit(const GistEntryVector *entryvec, GIST_SP
 				  const gbtree_vinfo * tinfo);
 extern void gbt_var_bin_union(Datum *u, GBT_VARKEY * e,
 				  const gbtree_vinfo * tinfo);
+
+#endif