diff --git a/build_io.sh b/build_io.sh
index ab16b6eb6e06c23c84b1fbbca75081a84f7195bd..ded27aa1a9c876c50d3e7b31d159540197b9e5bc 100755
--- a/build_io.sh
+++ b/build_io.sh
@@ -15,7 +15,7 @@ cd "$1/openfpm_data"
 git checkout develop
 cd ..
 
-cd "$1/openfpm_IO"
+cd "$1/openfpm_io"
 
 echo "Compiling on $2"