diff --git configure.in configure.in
index 0d9236a..0447104 100644
--- configure.in
+++ configure.in
@@ -9034,6 +9034,20 @@ AC_SUBST(MOZ_FOLD_LIBS)
 AC_SUBST(MOZ_ENABLE_SZIP)
 AC_SUBST(MOZ_SZIP_FLAGS)
 
+AC_MSG_CHECKING([for posix_fadvise])
+AC_TRY_LINK([#define _XOPEN_SOURCE 600
+  #include <fcntl.h>],
+                 [posix_fadvise(0, 0, 0, 0);],
+                 [ac_cv___posix_fadvise=true],
+                 [ac_cv___posix_fadvise=false])
+
+if test "$ac_cv___posix_fadvise" = true ; then
+  AC_DEFINE(HAVE_POSIX_FADVISE)
+  AC_MSG_RESULT(yes)
+else
+  AC_MSG_RESULT(no)
+fi
+
 AC_MSG_CHECKING([for posix_fallocate])
 AC_TRY_LINK([#define _XOPEN_SOURCE 600
   #include <fcntl.h>],
diff --git js/src/configure.in js/src/configure.in
index da9767c..352ba14 100644
--- js/src/configure.in
+++ js/src/configure.in
@@ -4025,6 +4025,20 @@ AC_SUBST(CXX_VERSION)
 AC_SUBST(MSMANIFEST_TOOL)
 AC_SUBST(MOZ_LINKER)
 
+AC_MSG_CHECKING([for posix_fadvise])
+AC_TRY_LINK([#define _XOPEN_SOURCE 600
+  #include <fcntl.h>],
+                 [posix_fadvise(0, 0, 0, 0);],
+                 [ac_cv___posix_fadvise=true],
+                 [ac_cv___posix_fadvise=false])
+
+if test "$ac_cv___posix_fadvise" = true ; then
+  AC_DEFINE(HAVE_POSIX_FADVISE)
+  AC_MSG_RESULT(yes)
+else
+  AC_MSG_RESULT(no)
+fi
+
 AC_MSG_CHECKING([for posix_fallocate])
 AC_TRY_LINK([#define _XOPEN_SOURCE 600
   #include <fcntl.h>],
diff --git xpcom/io/nsLocalFileUnix.cpp xpcom/io/nsLocalFileUnix.cpp
index bacf06c..0e46e4a 100644
--- xpcom/io/nsLocalFileUnix.cpp
+++ xpcom/io/nsLocalFileUnix.cpp
@@ -382,7 +382,7 @@ nsLocalFile::OpenNSPRFileDesc(int32_t flags, int32_t mode, PRFileDesc **_retval)
         PR_Delete(mPath.get());
     }
 
-#if defined(LINUX) && !defined(ANDROID)
+#if defined(HAVE_POSIX_FADVISE)
     if (flags & OS_READAHEAD) {
         posix_fadvise(PR_FileDesc2NativeHandle(*_retval), 0, 0,
                       POSIX_FADV_SEQUENTIAL);