diff --git a/Black-Hat-Python/BHP-Code/Chapter11/grabhashes.py b/Black-Hat-Python/BHP-Code/Chapter11/grabhashes.py
index 5150bcf..e4574ac 100644
--- a/Black-Hat-Python/BHP-Code/Chapter11/grabhashes.py
+++ b/Black-Hat-Python/BHP-Code/Chapter11/grabhashes.py
@@ -1,6 +1,6 @@
 import sys
 import struct
-
+import mathlab
 memory_file       = "WinXPSP2.vmem"
 
 sys.path.append("/Downloads/volatility-2.3.1")
@@ -52,4 +52,4 @@
         break
 
 if sam_offset is None or sys_offset is None:
-    print "[*] Failed to find the system or SAM offsets."
\ No newline at end of file
+    print "[*] Failed to find the system or SAM offsets."