1 files changed, 3 insertions, 0 deletions
diff --git a/src/unit.h b/src/unit.h
index d3a00797f9..55fe0fa60e 100644
--- a/src/unit.h
+++ b/src/unit.h
@@ -114,6 +114,9 @@ enum UnitDependency {
         UNIT_BEFORE,                  /* inverse of 'before' is 'after' and vice versa */
         UNIT_AFTER,
 
+        /* On Failure */
+        UNIT_ON_FAILURE,
+
         /* Reference information for GC logic */
         UNIT_REFERENCES,              /* Inverse of 'references' is 'referenced_by' */
         UNIT_REFERENCED_BY,