diff --git a/compiler-rt/test/asan/TestCases/Linux/leak_check_segv.cpp b/compiler-rt/test/asan/TestCases/Linux/leak_check_segv.cpp
--- a/compiler-rt/test/asan/TestCases/Linux/leak_check_segv.cpp
+++ b/compiler-rt/test/asan/TestCases/Linux/leak_check_segv.cpp
@@ -1,18 +1,22 @@
 // Test that SIGSEGV during leak checking does not crash the process.
 // RUN: %clangxx_asan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
 // REQUIRES: leak-detection
-#include <stdlib.h>
+#include <sanitizer/lsan_interface.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/mman.h>
-#include <sanitizer/lsan_interface.h>
+#include <unistd.h>
 
 char data[10 * 1024 * 1024];
 
 int main() {
   void *p = malloc(10 * 1024 * 1024);
+  const unsigned long kPageBitsMask = getpagesize() - 1;
   // surprise-surprise!
-  mprotect((void*)(((unsigned long)p + 4095) & ~4095), 16 * 1024, PROT_NONE);
-  mprotect((void*)(((unsigned long)data + 4095) & ~4095), 16 * 1024, PROT_NONE);
+  mprotect((void *)(((unsigned long)p + kPageBitsMask) & ~kPageBitsMask),
+           16 * 1024, PROT_NONE);
+  mprotect((void *)(((unsigned long)data + kPageBitsMask) & ~kPageBitsMask),
+           16 * 1024, PROT_NONE);
   __lsan_do_leak_check();
   fprintf(stderr, "DONE\n");
 }