fix required nasm version
diff --git a/README b/README
index edfff11..0db98b7 100644
--- a/README
+++ b/README
@@ -81,7 +81,8 @@
 libogg 1.1.2 or greater, or there will be seeking problems with Ogg FLAC.
 
 If you are building on x86 and want the assembly optimizations, you will
-need to have NASM installed according to the specific instructions below.
+need to have NASM >= 0.98.30 installed according to the specific instructions
+below.
 
 
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