diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/language/settings/providers/LanguageSettingsProvidersSerializer.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/language/settings/providers/LanguageSettingsProvidersSerializer.java
index b20ca4b62f3..cbb1001c69f 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/language/settings/providers/LanguageSettingsProvidersSerializer.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/language/settings/providers/LanguageSettingsProvidersSerializer.java
@@ -20,6 +20,7 @@ import java.util.Map;
 import java.util.Set;
 
 import org.eclipse.cdt.core.CCorePlugin;
+import org.eclipse.cdt.core.CommandLauncherManager;
 import org.eclipse.cdt.core.language.settings.providers.ICListenerAgent;
 import org.eclipse.cdt.core.language.settings.providers.ILanguageSettingsBroadcastingProvider;
 import org.eclipse.cdt.core.language.settings.providers.ILanguageSettingsChangeEvent;
@@ -178,6 +179,10 @@ public class LanguageSettingsProvidersSerializer {
 		public List<ICLanguageSettingEntry> getSettingEntries(ICConfigurationDescription cfgDescription, IResource rc, String languageId) {
 			ILanguageSettingsProvider rawProvider = getRawProvider();
 			List<ICLanguageSettingEntry> entries = rawProvider!=null ? rawProvider.getSettingEntries(cfgDescription, rc, languageId) : null;
+			if (cfgDescription != null) {
+				IProject project = cfgDescription.getProjectDescription().getProject();
+				entries = CommandLauncherManager.getInstance().getLanguageSettingEntries(project, entries);
+			}
 			return entries;
 		}
 
diff --git a/launch/org.eclipse.cdt.docker.launcher/src/org/eclipse/cdt/internal/docker/launcher/ContainerPropertyTab.java b/launch/org.eclipse.cdt.docker.launcher/src/org/eclipse/cdt/internal/docker/launcher/ContainerPropertyTab.java
index 0aa9eb15693..ded93dcd538 100644
--- a/launch/org.eclipse.cdt.docker.launcher/src/org/eclipse/cdt/internal/docker/launcher/ContainerPropertyTab.java
+++ b/launch/org.eclipse.cdt.docker.launcher/src/org/eclipse/cdt/internal/docker/launcher/ContainerPropertyTab.java
@@ -359,7 +359,8 @@ public class ContainerPropertyTab extends AbstractCBuildPropertyTab
 				.getProperty(ContainerCommandLauncher.CONTAINER_BUILD_ENABLED);
 		String enablementProperty2 = prop2
 				.getProperty(ContainerCommandLauncher.CONTAINER_BUILD_ENABLED);
-		if (!enablementProperty.equals(enablementProperty2)) {
+		if (enablementProperty != null
+				&& !enablementProperty.equals(enablementProperty2)) {
 			needToRecalculate = true;
 		}
 		prop2.setProperty(ContainerCommandLauncher.CONTAINER_BUILD_ENABLED,