diff --git a/src/config.h b/src/config.h
index 6835ea96eb0f7dcb2c957c4560dffbb4b0f934a8..a8ffe9c589993651bedd02963113e2783b2d585b 100644
--- a/src/config.h
+++ b/src/config.h
@@ -211,7 +211,7 @@
 #define TIME_WITH_SYS_TIME 1
 
 /* Number of bits in a file offset, on hosts where this is settable. */
-/* #undef _FILE_OFFSET_BITS */
+#define _FILE_OFFSET_BITS 64
 
 /* Define for large files, on AIX-style hosts. */
 /* #undef _LARGE_FILES */