diff --git a/mwtypes/files/p7z.py b/mwtypes/files/p7z.py
index 8c76080..2212e6f 100644
--- a/mwtypes/files/p7z.py
+++ b/mwtypes/files/p7z.py
@@ -15,7 +15,7 @@ def reader(path):
             the path to the dump file to read
     """
     p = subprocess.Popen(
-        ['7z', 'e', '-so', path],
+        ['7za', 'e', '-so', path],
         stdout=subprocess.PIPE,
         stderr=file_open(os.devnull, "w")
     )