diff --git a/src/main/java/com/powsybl/openloadflow/network/action/LfActionUtils.java b/src/main/java/com/powsybl/openloadflow/network/action/LfActionUtils.java
index da1b6dba0d..124d0c20fe 100644
--- a/src/main/java/com/powsybl/openloadflow/network/action/LfActionUtils.java
+++ b/src/main/java/com/powsybl/openloadflow/network/action/LfActionUtils.java
@@ -85,7 +85,7 @@ private static void updateConnectivity(List<LfAction> branchActions, LfNetwork n
         connectivity.startTemporaryChanges();
 
         branchActions.forEach(action -> {
-            if (((AbstractLfBranchAction<?>) action).applyOnConnectivity(network, connectivity)) {
+            if (!((AbstractLfBranchAction<?>) action).applyOnConnectivity(network, connectivity)) {
                 LOGGER.warn("Action {} : may not have been applied successfully.", action.getId());
             }
         });