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-rw-r--r--lib/filemode.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/filemode.h b/lib/filemode.h
index 15a8dcc3760..3e1d9903eac 100644
--- a/lib/filemode.h
+++ b/lib/filemode.h
@@ -17,6 +17,12 @@
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#ifndef FILEMODE_H_
+# define FILEMODE_H_
+
+/* This file uses HAVE_DECL_STRMODE. */
+# if !_GL_CONFIG_H_INCLUDED
+# error "Please include config.h first."
+# endif
# include <sys/types.h>
# include <sys/stat.h>