diff --git a/BUILDING.txt b/BUILDING.txt
index 28ff0a38..aa1d1cfe 100644
--- a/BUILDING.txt
+++ b/BUILDING.txt
@@ -56,7 +56,7 @@ library.  See below for 64-bit build instructions.)
   cd {source_directory}
   autoreconf -fiv
   cd {build_directory}
-  sh {source_directory}/configure
+  sh {source_directory}/configure [additional configure flags]
   make
 
 NOTE: Running autoreconf in the source directory is only necessary if building