diff --git a/tools/testing/selftests/bpf/prog_tests/arena_htab.c b/tools/testing/selftests/bpf/prog_tests/arena_htab.c
index 0766702de846..d69fd2465f53 100644
--- a/tools/testing/selftests/bpf/prog_tests/arena_htab.c
+++ b/tools/testing/selftests/bpf/prog_tests/arena_htab.c
@@ -3,12 +3,14 @@
 #include <test_progs.h>
 #include <sys/mman.h>
 #include <network_helpers.h>
-
+#include <sys/user.h>
+#ifndef PAGE_SIZE /* on some archs it comes in sys/user.h */
+#include <unistd.h>
+#define PAGE_SIZE getpagesize()
+#endif
 #include "arena_htab_asm.skel.h"
 #include "arena_htab.skel.h"
 
-#define PAGE_SIZE 4096
-
 #include "bpf_arena_htab.h"
 
 static void test_arena_htab_common(struct htab *htab)
diff --git a/tools/testing/selftests/bpf/prog_tests/arena_list.c b/tools/testing/selftests/bpf/prog_tests/arena_list.c
index e61886debab1..d15867cddde0 100644
--- a/tools/testing/selftests/bpf/prog_tests/arena_list.c
+++ b/tools/testing/selftests/bpf/prog_tests/arena_list.c
@@ -3,8 +3,11 @@
 #include <test_progs.h>
 #include <sys/mman.h>
 #include <network_helpers.h>
-
-#define PAGE_SIZE 4096
+#include <sys/user.h>
+#ifndef PAGE_SIZE /* on some archs it comes in sys/user.h */
+#include <unistd.h>
+#define PAGE_SIZE getpagesize()
+#endif
 
 #include "bpf_arena_list.h"
 #include "arena_list.skel.h"