diff --git a/roaring/README.md b/roaring/README.md
index 3599a6813..1479e27c5 100644
--- a/roaring/README.md
+++ b/roaring/README.md
@@ -14,7 +14,7 @@ You must now make the workdir/corpus directory. This is achieved by:
 
 The fuzzer needs some input to start the fuzzing with. Copy some sample fragments into the workdir/corpus folder. Once you have copied your sample inputs, you are ready to run the fuzzer:
 
-`go-fuzz`
+`go-fuzz -bin=roaring-fuzz.zip -workdir=workdir -func=FuzzBitmapUnmarshalBianry`
 
 ## Understanding the Fuzzer Output