diff --git a/bld/linux.py b/bld/linux.py
index 167156e1999..8bf6e2afb4a 100644
--- a/bld/linux.py
+++ b/bld/linux.py
@@ -1,7 +1,7 @@
 config = {
     'mock_target': 'mozilla-centos6-x86_64',
     'mock_packages': ['freetype-devel', 'fontconfig-devel', 'glib2-devel', 'autoconf213', 'git', 'make', 'libX11-devel', 'mesa-libGL-devel', 'freeglut-devel',
-                      'xorg-x11-server-devel', 'libXrandr-devel', 'libXi-devel', 'libpng-devel', 'expat-devel'],
+                      'xorg-x11-server-devel', 'libXrandr-devel', 'libXi-devel', 'libpng-devel', 'expat-devel', 'gperf'],
     'mock_files': [('/home/servobld/.ssh', '/home/mock_mozilla/.ssh')],
     'concurrency': 6,
     'add_actions': ['setup-mock'],