diff --git a/tests/libs/segment_gap_outer.cpp b/tests/libs/segment_gap_outer.cpp
index 3ba90d0..0328a99 100644
--- a/tests/libs/segment_gap_outer.cpp
+++ b/tests/libs/segment_gap_outer.cpp
@@ -1,6 +1,7 @@
 #include <android/dlext.h>
 #include <dlfcn.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 extern "C" void __attribute__((section(".custom_text"))) text_before_start_of_gap() {}
 char __attribute__((section(".custom_bss"))) end_of_gap[0x1000];
@@ -10,8 +11,9 @@
   info.flags = ANDROID_DLEXT_RESERVED_ADDRESS;
 
   char* start_of_gap =
-      reinterpret_cast<char*>(reinterpret_cast<uintptr_t>(text_before_start_of_gap) & ~0xfffull) +
-      0x1000;
+      reinterpret_cast<char*>(
+          (reinterpret_cast<uintptr_t>(text_before_start_of_gap) &
+           ~(sysconf(_SC_PAGESIZE) - 1)) + sysconf(_SC_PAGESIZE));
   info.reserved_addr = start_of_gap;
   info.reserved_size = end_of_gap - start_of_gap;