diff --git a/src/include/port/hpux.h b/src/include/port/hpux.h
index e140c3cfcfc9dc8073d9b4aa0153c8b13c51228c..82b1cadd8fc07bbdfb5585408c55ff483681c7e5 100644
--- a/src/include/port/hpux.h
+++ b/src/include/port/hpux.h
@@ -15,5 +15,9 @@ typedef struct
 #endif
 #ifndef			BYTE_ORDER
 #define			BYTE_ORDER		BIG_ENDIAN
+#endif
 
+/* workaround for nonstandard large file support implementation */
+#if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
+#define _LARGEFILE64_SOURCE 1
 #endif