diff --git a/pygmtsar/pygmtsar/SBAS_merge.py b/pygmtsar/pygmtsar/SBAS_merge.py
index 42bcc668..a65bc867 100644
--- a/pygmtsar/pygmtsar/SBAS_merge.py
+++ b/pygmtsar/pygmtsar/SBAS_merge.py
@@ -29,7 +29,7 @@ def merge(self, grid, debug=False):
         configuration files, PRM files, and performs the merge using the merge_swath command-line tool.
 
         """
-        import numpy
+        import numpy as np
         import os
 
         fullname = lambda filename: os.path.join(self.basedir, filename)