diff --git a/ChangeLog b/ChangeLog
index e998fa7b6..eae8f2b24 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2016-09-02  Werner Lemberg  <wl@gnu.org>
+
+	[unix] Enable 64bit support in file system access (#48962).
+
+	* builds/unix/configure.raw: Call `AC_SYS_LARGEFILE'.
+
 2016-09-02  Werner Lemberg  <wl@gnu.org>
 
 	[sfnt] Avoid left shift of negative value (#48980).
diff --git a/builds/unix/configure.raw b/builds/unix/configure.raw
index dc38ba4f4..71f10395d 100644
--- a/builds/unix/configure.raw
+++ b/builds/unix/configure.raw
@@ -180,6 +180,8 @@ CPPFLAGS="${orig_CPPFLAGS}"
 
 # checks for library functions
 
+AC_SYS_LARGEFILE
+
 # Here we check whether we can use our mmap file component.
 
 AC_ARG_ENABLE([mmap],