diff --git a/src/backend/access/gist/gistproc.c b/src/backend/access/gist/gistproc.c
index ffb1d772ad9ae1a621cc955648d842134331ea3f..15b89fd8ade73bbbb68c382c4d56fc5073f1a834 100644
--- a/src/backend/access/gist/gistproc.c
+++ b/src/backend/access/gist/gistproc.c
@@ -17,6 +17,7 @@
  */
 #include "postgres.h"
 
+#include <float.h>
 #include <math.h>
 
 #include "access/gist.h"
diff --git a/src/backend/access/gist/gistutil.c b/src/backend/access/gist/gistutil.c
index 75845ba0e761d531ad1bd1d5fa391560aa5aa252..cbdaec9d2b34d73a60c7682e3486836212cdc50f 100644
--- a/src/backend/access/gist/gistutil.c
+++ b/src/backend/access/gist/gistutil.c
@@ -13,6 +13,7 @@
  */
 #include "postgres.h"
 
+#include <float.h>
 #include <math.h>
 
 #include "access/gist_private.h"
diff --git a/src/backend/utils/adt/orderedsetaggs.c b/src/backend/utils/adt/orderedsetaggs.c
index f9f18f2cc627edddc98a888e3121bf62e4f315a2..e462fbd539d547bc3e13f4f9c355ef598480042b 100644
--- a/src/backend/utils/adt/orderedsetaggs.c
+++ b/src/backend/utils/adt/orderedsetaggs.c
@@ -14,6 +14,7 @@
  */
 #include "postgres.h"
 
+#include <float.h>
 #include <math.h>
 
 #include "catalog/pg_aggregate.h"
diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c
index 8b05e8f9f79e34e9a0e108380fbc440183637cae..a04fd7bc905ce5191ae48a104371a4e92a59f07b 100644
--- a/src/backend/utils/adt/selfuncs.c
+++ b/src/backend/utils/adt/selfuncs.c
@@ -98,6 +98,7 @@
 #include "postgres.h"
 
 #include <ctype.h>
+#include <float.h>
 #include <math.h>
 
 #include "access/gin.h"