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-rw-r--r--src/mtx_qhull/list.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mtx_qhull/list.h b/src/mtx_qhull/list.h
index 699f9ed..ca76cb7 100644
--- a/src/mtx_qhull/list.h
+++ b/src/mtx_qhull/list.h
@@ -1,3 +1,5 @@
+#ifndef QHULL_LIST_H
+#define QHULL_LIST_H
typedef long int entry_t;
typedef long int index_t;
@@ -36,3 +38,4 @@ list_t findValueListInList(const list_t value_list, const list_t list);
entry_t findValueInList(const entry_t entry, const list_t list);
void printList(const list_t list);
+#endif /* QHULL_LIST_H */