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-rw-r--r--camlibs/docupen/docupen.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/camlibs/docupen/docupen.h b/camlibs/docupen/docupen.h
index ac45ea9ad..3b9c44603 100644
--- a/camlibs/docupen/docupen.h
+++ b/camlibs/docupen/docupen.h
@@ -1,3 +1,6 @@
+#ifndef CAMLIBS_DOCUPEN_DOCUPEN_H
+#define CAMLIBS_DOCUPEN_DOCUPEN_H
+
#include <string.h>
#include <stdbool.h>
#include <stdint.h>
@@ -89,3 +92,5 @@ bool dp_init_calibration(Camera *camera, bool force);
gdImagePtr dp_get_image_mono(struct dp_imagehdr *dp, void *data);
gdImagePtr dp_get_image_grey(struct dp_imagehdr *dp, void *data, struct lut *lut);
gdImagePtr dp_get_image_color(struct dp_imagehdr *dp, void *data, struct lut *lut);
+
+#endif /* !defined(CAMLIBS_DOCUPEN_DOCUPEN_H) */