diff --git a/INSTALL.quagga.txt b/INSTALL.quagga.txt
index 72cbd97..6ba1462 100644
--- a/INSTALL.quagga.txt
+++ b/INSTALL.quagga.txt
@@ -1,4 +1,4 @@
-# $Id: INSTALL.quagga.txt,v 1.7 2004/11/23 12:21:16 gdt Exp $
+# $Id: INSTALL.quagga.txt,v 1.8 2004/11/23 17:19:21 gdt Exp $
 
 --------------------------------------------------------------------------
 Building and Installing Quagga from releases or snapshots:
@@ -6,6 +6,8 @@
 The 'INSTALL' file contains generic instructions on how to use 'configure'
 scripts.
 
+Quagga requires a C compiler supporting the C99 standard.
+
 Quagga can be compiled with either BSD make or GNU make.
 GNU make 3.80 is known to work.
 The following system makes are known to work