diff --git a/README_BUILD_FIRESTORM_WIN32.txt b/README_BUILD_FIRESTORM_WIN32.txt
index 935e031930..a9690dcd64 100755
--- a/README_BUILD_FIRESTORM_WIN32.txt
+++ b/README_BUILD_FIRESTORM_WIN32.txt
@@ -2,7 +2,7 @@ Before you start configuring your Windows build system, be aware of our tested c
 	Memory: You will need at least 2GB RAM, 4GB strongly recommended.
 	CPU: Multiple CPUs are strongly recommended. 
 	  A build can take over an hour.
-	Visual Studio 2010. 
+	Visual Studio 2010 SP1. 
 
 Ensure you can build a stock viewer-development try as described in the SL wiki. Before asking for any help
 compiling Firestorm, make sure you can build viewer-development first. If you try and skip this step, you may