diff --git a/circtools/primex/primex.py b/circtools/primex/primex.py
index 9d41f417..37fbd01d 100755
--- a/circtools/primex/primex.py
+++ b/circtools/primex/primex.py
@@ -80,7 +80,7 @@ def call_blast(self, input_file, organism):
         elif organism == "rn":
             blast_db = self.rattus_norvegicus_blast_db
         elif organism == "ss":
-            blast_db = self.rattus_norvegicus_blast_db
+            blast_db = self.sus_scrofa_blast_db
 
         return_handle = NCBIWWW.qblast("blastn",
                                        blast_db,