2 files changed, 3 insertions, 3 deletions

diff --git a/mat/exiftool.py b/mat/exiftool.py
index c6c1ada..758a094 100644
--- a/mat/exiftool.py
+++ b/mat/exiftool.py
@@ -33,14 +33,14 @@ class ExiftoolStripper(parser.GenericParser):
         try:
             if self.backup:
                 # Note: '-All=' must be followed by a known exiftool option.
-                process = subprocess.Popen(['exiftool', '-All=',
+                process = subprocess.Popen(['exiftool', '-m', '-All=',
                     '-out', self.output, self.filename],
                     stdout=open('/dev/null'))
                 process.wait()
             else:
                 # Note: '-All=' must be followed by a known exiftool option.
                 process = subprocess.Popen(
-                    [ 'exiftool', '-All=', '-overwrite_original', self.filename ],
+                    [ 'exiftool', '-m', '-All=', '-overwrite_original', self.filename ],
                     stdout=open('/dev/null'))
                 process.wait()
             return True
diff --git a/mat/office.py b/mat/office.py
index 41411c7..d1e781e 100644
--- a/mat/office.py
+++ b/mat/office.py
@@ -188,7 +188,7 @@ class PdfStripper(parser.GenericParser):
             import exiftool
             # Note: '-All=' must be followed by a known exiftool option.
             if self.backup:
-                process = subprocess.Popen(['exiftool', '-All=',
+                process = subprocess.Popen(['exiftool', '-m', '-All=',
                     '-out', self.output, self.filename], stdout=open('/dev/null'))
                 process.wait()
             else: