diff --git a/pgxn/neon/file_cache.c b/pgxn/neon/file_cache.c
index 6e6823318e..4251186e6f 100644
--- a/pgxn/neon/file_cache.c
+++ b/pgxn/neon/file_cache.c
@@ -17,7 +17,6 @@
 #include <sys/statvfs.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <math.h>
 
 #include "postgres.h"
 #include "funcapi.h"