diff --git a/songbook_core/build.py b/songbook_core/build.py
index c43b8780..afa72d20 100644
--- a/songbook_core/build.py
+++ b/songbook_core/build.py
@@ -241,6 +241,8 @@ class SongbookBuilder(object):
             line = p.stdout.readline()
         LOGGER.debug(log)
 
+        p.wait()
+
         if p.returncode:
             raise errors.LatexCompilationError(self.basename)