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-rw-r--r--digital/io/src/fsm.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/digital/io/src/fsm.h b/digital/io/src/fsm.h
index 72dfc56e..f06c92fb 100644
--- a/digital/io/src/fsm.h
+++ b/digital/io/src/fsm.h
@@ -56,7 +56,7 @@ typedef u8 fsm_branch_t;
typedef fsm_branch_t (*fsm_transition_t) (void);
/** Maximum number of active states. */
-#define FSM_ACTIVE_STATES_MAX 3
+#define FSM_ACTIVE_STATES_MAX 4
/** Context of an FSM. */
struct fsm_t