diff --git a/src/main/java/com/powsybl/openloadflow/dc/DcLoadFlowEngine.java b/src/main/java/com/powsybl/openloadflow/dc/DcLoadFlowEngine.java
index e5e052014d..6bc7a1841b 100644
--- a/src/main/java/com/powsybl/openloadflow/dc/DcLoadFlowEngine.java
+++ b/src/main/java/com/powsybl/openloadflow/dc/DcLoadFlowEngine.java
@@ -74,7 +74,9 @@ public static double distributeSlack(LfNetwork network, Collection<LfBus> buses,
     public static double getActivePowerMismatch(Collection<LfBus> buses) {
         double mismatch = 0;
         for (LfBus b : buses) {
-            mismatch += b.getGenerationTargetP() - b.getLoadTargetP();
+            if (!b.isDisabled()) {
+                mismatch += b.getGenerationTargetP() - b.getLoadTargetP();
+            }
         }
         return -mismatch;
     }
diff --git a/src/test/java/com/powsybl/openloadflow/sa/WoodburyDcSecurityAnalysisWithActionsTest.java b/src/test/java/com/powsybl/openloadflow/sa/WoodburyDcSecurityAnalysisWithActionsTest.java
index 54a708400c..8b434a088d 100644
--- a/src/test/java/com/powsybl/openloadflow/sa/WoodburyDcSecurityAnalysisWithActionsTest.java
+++ b/src/test/java/com/powsybl/openloadflow/sa/WoodburyDcSecurityAnalysisWithActionsTest.java
@@ -219,9 +219,9 @@ void testSaDcPhaseTapChangerTapPositionChangeAlphaOnly(boolean dcFastMode) {
         assertEquals(network.getTwoWindingsTransformer("PS1").getTerminal2().getP(), brRelPS1.getP2(), LoadFlowAssert.DELTA_POWER);
     }
 
-    // TODO Does not work in DC mode - to fix in a separate PR
-    @Test
-    void testSaDcPhaseTapChangerTapPositionChangeWithConnectivityBreak() {
+    @ParameterizedTest
+    @ValueSource(booleans = {false, true})
+    void testSaDcPhaseTapChangerTapPositionChangeWithConnectivityBreak(boolean fastDcMode) {
         Network network = PhaseControlFactory.createNetworkWith3Buses();
 
         List<StateMonitor> monitors = createAllBranchesMonitors(network);
@@ -235,6 +235,8 @@ void testSaDcPhaseTapChangerTapPositionChangeWithConnectivityBreak() {
         OpenLoadFlowParameters.create(parameters)
                 .setSlackBusId("VL2_0")
                 .setSlackBusSelectionMode(SlackBusSelectionMode.NAME);
+        securityAnalysisParameters.getExtension(OpenSecurityAnalysisParameters.class)
+                .setDcFastMode(fastDcMode);
         SecurityAnalysisResult result = runSecurityAnalysis(network, contingencies, monitors, securityAnalysisParameters,
                 operatorStrategies, actions, ReportNode.NO_OP);