matplotlib
diff --git a/‎lib/matplotlib/backends/backend_pgf.py
Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_pgf.py
+2-1Lines changed: 2 additions & 1 deletion b/‎lib/matplotlib/backends/backend_pgf.py
Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_pgf.py
+2-1Lines changed: 2 additions & 1 deletion
@@ -212,9 +212,10 @@ def _build_latex_header():
         # fonts later when we don't expect the additional output on stdout.
         # TODO: is this sufficient?
         latex_header = [
+            r"\documentclass{minimal}",
             # Include TeX program name as a comment for cache invalidation.
+            # TeX does not allow this to be the first line.
             r"% !TeX program = {}".format(rcParams["pgf.texsystem"]),
-            r"\documentclass{minimal}",
             latex_preamble,
             latex_fontspec,
             r"\begin{document}",