diff --git a/contrib/gitian-build.py b/contrib/gitian-build.py
--- a/contrib/gitian-build.py
+++ b/contrib/gitian-build.py
@@ -115,7 +115,7 @@
         os.chdir(workdir)
 
 
-def sign():
+def sign_binaries():
     global args, workdir
     os.chdir('gitian-builder')
 
@@ -195,7 +195,7 @@
                         dest='verify', help='Verify the Gitian build')
     parser.add_argument('-b', '--build', action='store_true',
                         dest='build', help='Do a Gitian build')
-    parser.add_argument('-s', '--sign', action='store_true', dest='sign',
+    parser.add_argument('-s', '--sign-binaries', action='store_true', dest='sign_binaries',
                         help='Make signed binaries for Windows and MacOS')
     parser.add_argument('-o', '--os', dest='os', default='lwm',
                         help='Specify which Operating Systems the build is for. Default is %(default)s. l for Linux, w for Windows, m for MacOS')
@@ -285,8 +285,8 @@
     if args.build:
         build()
 
-    if args.sign:
-        sign()
+    if args.sign_binaries:
+        sign_binaries()
 
     if args.verify:
         verify()