diff --git a/bin/hicstuff_cutsite.py b/bin/hicstuff_cutsite.py
index a53466aeaf03b8ec5f358709544f07b4752adeca..058c907d82041b4d67c752841d25d1e422d40dc0 100755
--- a/bin/hicstuff_cutsite.py
+++ b/bin/hicstuff_cutsite.py
@@ -414,6 +414,6 @@ if __name__ == "__main__":
     elif enzyme == "mboi":
         enzyme = "MboI"
     elif enzyme == "arima":
-        enzyme = ["DpnII","HinfI"]
+        enzyme = "DpnII,HinfI"
 
     cut_ligation_sites(reads1, reads2, out1, out2, enzyme, mode, seed_size, n_cpu)