diff --git a/gget/gget_diamond.py b/gget/gget_diamond.py
index e7a53461..5c99a4e8 100644
--- a/gget/gget_diamond.py
+++ b/gget/gget_diamond.py
@@ -59,6 +59,9 @@ def create_input_file(sequences):
     Returns: input file absolute path
     """
     # print(f"sequences for input file{sequences}")
+    if type(sequences) == str:
+        sequences = [sequences]
+
     with open(f"tmp_{RANDOM_ID}.fa", "w") as f:
         for idx, seq in enumerate(sequences):
             f.write(f">Seq {idx}\n{seq}\n")