diff --git a/src/include/utils/selfuncs.h b/src/include/utils/selfuncs.h
index 9554952a8a..353d38a3ff 100644
--- a/src/include/utils/selfuncs.h
+++ b/src/include/utils/selfuncs.h
@@ -16,6 +16,7 @@
 #define SELFUNCS_H
 
 #include "access/htup.h"
+#include "fmgr.h"
 #include "nodes/pathnodes.h"