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-rw-r--r--src/maskvalues.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/maskvalues.h b/src/maskvalues.h
index bbaa95b..af1097d 100644
--- a/src/maskvalues.h
+++ b/src/maskvalues.h
@@ -2,6 +2,9 @@
/* Values of the mask */
+#ifndef MASKVALUES_H
+#define MASKVALUES_H
+
#ifdef CCODE
#define MASK_EXCISED 0.0
@@ -17,3 +20,5 @@
#define MASK_ACTIVE 1.0D0
#endif
+
+#endif /* #ifdef MASKVALUES_H */