diff --git a/pgxn/neon/relperst_cache.c b/pgxn/neon/relperst_cache.c
index 49d0e19ae6..176ec7c3da 100644
--- a/pgxn/neon/relperst_cache.c
+++ b/pgxn/neon/relperst_cache.c
@@ -24,9 +24,7 @@
 #include "utils/dynahash.h"
 #include "utils/guc.h"
 
-#if PG_VERSION_NUM >= 150000
 #include "miscadmin.h"
-#endif
 
 /*
  * The main goal of this cache is to avoid repeated calls of mdexists in neon_write,