diff --git a/cmake/DaemonFlags.cmake b/cmake/DaemonFlags.cmake
index a850ce806e..7b8fa13cc0 100644
--- a/cmake/DaemonFlags.cmake
+++ b/cmake/DaemonFlags.cmake
@@ -183,6 +183,7 @@ elseif (NACL)
     set_cxx_flag("-std=gnu++14")
 
     set_c_cxx_flag("-ffast-math")
+    set_c_cxx_flag("-fno-strict-aliasing")
     set_c_cxx_flag("-fvisibility=hidden")
     set_c_cxx_flag("-stdlib=libc++")
     set_c_cxx_flag("--pnacl-allow-exceptions")