diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog
index 86f2bcc3c22..2eaa7ce4e74 100644
--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
@@ -1,3 +1,7 @@
+2009-11-23  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* adaint.h: Assume large file support on IRIX only if _LFAPI.
+
 2009-11-21  Eric Botcazou  <ebotcazou@adacore.com>
             Laurent GUERBY  <laurent@guerby.net>
 
diff --git a/gcc/ada/adaint.h b/gcc/ada/adaint.h
index 76a181a001c..0412ffbf808 100644
--- a/gcc/ada/adaint.h
+++ b/gcc/ada/adaint.h
@@ -47,7 +47,7 @@
    determine at compile time what support the system offers for large files.
    For now we just list the platforms we have manually tested. */
 
-#if defined (__GLIBC__) || defined (sun)  || defined (__sgi)
+#if defined (__GLIBC__) || defined (sun)  || (defined (__sgi) && defined(_LFAPI))
 #define GNAT_FOPEN fopen64
 #define GNAT_STAT stat64
 #define GNAT_FSTAT fstat64