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-rw-r--r--Build/source/texk/web2c/c-auto.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/c-auto.in b/Build/source/texk/web2c/c-auto.in
index 01e05b9f2e2..6f3bb2a94e1 100644
--- a/Build/source/texk/web2c/c-auto.in
+++ b/Build/source/texk/web2c/c-auto.in
@@ -80,6 +80,9 @@
/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H
+/* Define to 1 if you have the <iostream> header file. */
+#undef HAVE_IOSTREAM
+
/* Define to 1 if you have the <langinfo_h> header file. */
#undef HAVE_LANGINFO_H