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-rw-r--r--camlibs/docupen/huffman.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/camlibs/docupen/huffman.h b/camlibs/docupen/huffman.h
index e010e2bf4..35603a641 100644
--- a/camlibs/docupen/huffman.h
+++ b/camlibs/docupen/huffman.h
@@ -1,3 +1,6 @@
+#ifndef CAMLIBS_DOCUPEN_HUFFMAN_H
+#define CAMLIBS_DOCUPEN_HUFFMAN_H
+
struct decoder {
unsigned char *data;
int length;
@@ -21,3 +24,5 @@ enum {
DECODER_WHITE,
DECODER_EOL
};
+
+#endif /* !defined(CAMLIBS_DOCUPEN_HUFFMAN_H) */