diff --git a/SWIG/README b/SWIG/README
index d83ef06e2..f75a973b1 100644
--- a/SWIG/README
+++ b/SWIG/README
@@ -139,6 +139,10 @@ the main SWIG distribution. There is no need to download anything else.
 
 Unix Installation
 =================
+You must use GNU `make' to build Swig.
+
+http://www.gnu.org/software/make/
+
 To build and install SWIG, simply type the following:
 
      % ./configure