diff --git a/build/unix/makepchinput.py b/build/unix/makepchinput.py
index d2f66471d70ee79abf175f9405d61e05064445cb..1468a872779300add9715cc65a5596b5120aba60 100755
--- a/build/unix/makepchinput.py
+++ b/build/unix/makepchinput.py
@@ -143,7 +143,6 @@ def getSTLIncludes():
                      "ciso646",
                      "ccomplex",
                      "ctgmath",
-                     "cstdalign",
                      "regex",
                      "cstdbool")