diff --git a/src/snps/io/reader.py b/src/snps/io/reader.py
index a8037dc..bcb44f6 100644
--- a/src/snps/io/reader.py
+++ b/src/snps/io/reader.py
@@ -1216,15 +1216,13 @@ def read_snps_csv(self, file, comments, compression):
         dict
             result of `read_helper`
         """
-        source = ""
+        source = "csv"
         phased = False
         build = 0
 
         comment_lines = comments.split("\n")
         for comment1 in comment_lines:
-            if "Source(s):" in comment1:
-                source = comment1.split("Source(s):")[1].strip()
-            elif "Phased:" in comment1:
+            if "Phased:" in comment1:
                 if comment1.split("Phased:")[1].strip() == "True":
                     phased = True
             elif "Build:" in comment1: