diff --git a/lib/os/onoff.c b/lib/os/onoff.c
index a7a2da37298..cad1bac28fd 100644
--- a/lib/os/onoff.c
+++ b/lib/os/onoff.c
@@ -222,6 +222,8 @@ static int process_recheck(struct onoff_manager *mgr)
 	} else if ((state == ONOFF_STATE_ERROR)
 		   && !sys_slist_is_empty(&mgr->clients)) {
 		evt = EVT_RESET;
+	} else {
+		;
 	}
 
 	return evt;
@@ -406,6 +408,8 @@ static void process_event(struct onoff_manager *mgr,
 		} else if ((mgr->flags & ONOFF_FLAG_RECHECK) != 0) {
 			mgr->flags &= ~ONOFF_FLAG_RECHECK;
 			evt = EVT_RECHECK;
+		} else {
+			;
 		}
 
 		state = mgr->flags & ONOFF_STATE_MASK;
diff --git a/lib/os/p4wq.c b/lib/os/p4wq.c
index ca98a578997..9d97824b0d2 100644
--- a/lib/os/p4wq.c
+++ b/lib/os/p4wq.c
@@ -63,6 +63,8 @@ static inline bool item_lessthan(struct k_p4wq_work *a, struct k_p4wq_work *b)
 	} else if ((a->priority == b->priority) &&
 		   (a->deadline != b->deadline)) {
 		return a->deadline - b->deadline > 0;
+	} else {
+		;
 	}
 	return false;
 }
diff --git a/lib/os/sem.c b/lib/os/sem.c
index 3f1ad4df424..e4b502e657b 100644
--- a/lib/os/sem.c
+++ b/lib/os/sem.c
@@ -74,8 +74,9 @@ int sys_sem_give(struct sys_sem *sem)
 		}
 	} else if (old_value >= sem->limit) {
 		return -EAGAIN;
+	} else {
+		;
 	}
-
 	return ret;
 }