diff --git a/lib/sanitizer_common/sanitizer_linux.cc b/lib/sanitizer_common/sanitizer_linux.cc
index c326750..09e9c42 100644
--- a/lib/sanitizer_common/sanitizer_linux.cc
+++ b/lib/sanitizer_common/sanitizer_linux.cc
@@ -614,7 +614,11 @@
 }
 
 uptr GetPageSize() {
+#if defined(__x86_64__) || defined(__i386__)
   return EXEC_PAGESIZE;
+#else
+  return sysconf(_SC_PAGESIZE);  // EXEC_PAGESIZE may not be trustworthy.
+#endif
 }
 
 // Match full names of the form /path/to/base_name{-,.}*