diff --git a/osx/macosx-builder.py b/osx/macosx-builder.py
index 54603aa..57ef00d 100644
--- a/osx/macosx-builder.py
+++ b/osx/macosx-builder.py
@@ -242,6 +242,9 @@ class MacosxBuilder(object):
         self.dmgbuild = _which(self.config.get('executables', 'dmgbuild'))
         self.mudraw_bin = _which(self.config.get('executables', 'mudrawbin'))
         self.mutool_bin = _which(self.config.get('executables', 'mutoolbin'))
+        if self.mutool_bin:
+            self.mutool_lib = os.path.abspath(
+                os.path.join(os.path.dirname(self.mutool_bin), '..', 'lib', 'libjbig2dec.0.dylib'))
 
     def setup_paths(self):
         """
@@ -452,11 +455,12 @@ class MacosxBuilder(object):
         copy(os.path.join(self.script_path, 'LICENSE.txt'), os.path.join(self.dist_path, 'LICENSE.txt'))
         self._print_verbose('... mudraw')
         if self.mudraw_bin and os.path.isfile(self.mudraw_bin):
-            copy(os.path.join(self.mudraw_bin), os.path.join(self.dist_path, 'mudraw'))
+            copy(self.mudraw_bin, os.path.join(self.dist_path, 'mudraw'))
             self.relink_mudraw()
         elif self.mutool_bin and os.path.isfile(self.mutool_bin):
-            copy(os.path.join(self.mutool_bin), os.path.join(self.dist_path, 'mutool'))
+            copy(self.mutool_bin, os.path.join(self.dist_path, 'mutool'))
             self.relink_mutool()
+            copy(self.mutool_lib, os.path.join(self.dist_path, 'libjbig2dec.0.dylib'))
         else:
             self._print('... WARNING: mudraw and mutool not found')