diff --git a/cnam.marc/thesis/build.py b/cnam.marc/thesis/build.py
index 5a58a27..cd9ebf9 100755
--- a/cnam.marc/thesis/build.py
+++ b/cnam.marc/thesis/build.py
@@ -140,7 +140,7 @@ def wipe(directory):
 def main():
     file = os.path.realpath(__file__)
     directory = os.path.dirname(file)
-    build(directory, len(sys.argv) == 1)
+    build(directory, len(sys.argv) == 0)
 
 
 if __name__ == '__main__':