diff --git a/setup/sequencers/DataAuditSequencer.php b/setup/sequencers/DataAuditSequencer.php
index bb8177483..92dc6cafe 100644
--- a/setup/sequencers/DataAuditSequencer.php
+++ b/setup/sequencers/DataAuditSequencer.php
@@ -55,7 +55,7 @@ class DataAuditSequencer extends StepSequencer
 					$sSourceDir = $this->oParams->Get('source_dir', 'datamodels/latest');
 					$sExtensionDir = $this->oParams->Get('extensions_dir', 'extensions');
 					$aRemovedExtensionCodes = $this->oParams->Get('removed_extensions', []);
-					$bUseSymbolicLinks = $this->oParams->Get('use-symbolic-links', null) === 'on';
+					$bUseSymbolicLinks = $this->oParams->Get('use_symbolic_links', null) === 'on';
 					$sMessage = $bUseSymbolicLinks ? 'Using symbolic links instead of copying data model files (for developers only!)' : '';
 					$this->oRunTimeEnvironment->DoCompile(
 						$aRemovedExtensionCodes,
diff --git a/setup/wizardsteps/AbstractWizStepInstall.php b/setup/wizardsteps/AbstractWizStepInstall.php
index 575a5894c..4776257b7 100644
--- a/setup/wizardsteps/AbstractWizStepInstall.php
+++ b/setup/wizardsteps/AbstractWizStepInstall.php
@@ -98,7 +98,7 @@ abstract class AbstractWizStepInstall extends WizardStep
 			'old_addon' => $this->oWizard->GetParameter('old_addon', false), // whether or not to use the "old" userrights profile addon
 			'options' => json_decode($this->oWizard->GetParameter('misc_options', '[]'), true),
 			'mysql_bindir' => $this->oWizard->GetParameter('mysql_bindir'),
-			'use-symbolic-links' => $this->oWizard->GetParameter('use-symbolic-links', MFCompiler::UseSymbolicLinks()),
+			'use_symbolic_links' => $this->oWizard->GetParameter('use_symbolic_links', MFCompiler::UseSymbolicLinks()),
 		];
 
 		if ($sBackupDestination != '') {
diff --git a/setup/wizardsteps/AbstractWizStepMiscParams.php b/setup/wizardsteps/AbstractWizStepMiscParams.php
index f62263ab2..81c7ba2f4 100644
--- a/setup/wizardsteps/AbstractWizStepMiscParams.php
+++ b/setup/wizardsteps/AbstractWizStepMiscParams.php
@@ -31,11 +31,11 @@ abstract class AbstractWizStepMiscParams extends WizardStep
 	final protected function AddUseSymlinksFlagOption(WebPage $oPage): void
 	{
 		if (MFCompiler::CanUseSymbolicLinks()) {
-			$sChecked = $this->oWizard->GetParameter('use-symbolic-links', MFCompiler::UseSymbolicLinks()) ? ' checked ' : '';
+			$sChecked = $this->oWizard->GetParameter('use_symbolic_links', MFCompiler::UseSymbolicLinks()) ? ' checked ' : '';
 
 			$oPage->add('<fieldset>');
 			$oPage->add('<legend>Dev parameters</legend>');
-			$oPage->p('<input id="use-symbolic-links" name="use-symbolic-links" type="checkbox"'.$sChecked.'><label for="use-symbolic-links">&nbsp;Create symbolic links instead of creating a copy in env-production (useful for debugging extensions)');
+			$oPage->p('<input id="use_symbolic_links" name="use_symbolic_links" type="checkbox"'.$sChecked.'><label for="use_symbolic_links">&nbsp;Create symbolic links instead of creating a copy in env-production (useful for debugging extensions)');
 			$oPage->add('</fieldset>');
 		}
 	}
diff --git a/setup/wizardsteps/WizStepInstallMiscParams.php b/setup/wizardsteps/WizStepInstallMiscParams.php
index c0ea7a31f..e6169793c 100644
--- a/setup/wizardsteps/WizStepInstallMiscParams.php
+++ b/setup/wizardsteps/WizStepInstallMiscParams.php
@@ -41,7 +41,7 @@ class WizStepInstallMiscParams extends AbstractWizStepMiscParams
 		$this->oWizard->SaveParameter('application_url', '');
 		$this->oWizard->SaveParameter('graphviz_path', '');
 		$this->oWizard->SaveParameter('sample_data', 'yes');
-		$this->oWizard->SaveParameter('use-symbolic-links', false);
+		$this->oWizard->SaveParameter('use_symbolic_links', false);
 		return new WizardState(WizStepModulesChoice::class, 'start_install');
 	}
 
diff --git a/setup/wizardsteps/WizStepUpgradeMiscParams.php b/setup/wizardsteps/WizStepUpgradeMiscParams.php
index 95639837b..0c1aecfd3 100644
--- a/setup/wizardsteps/WizStepUpgradeMiscParams.php
+++ b/setup/wizardsteps/WizStepUpgradeMiscParams.php
@@ -39,7 +39,7 @@ class WizStepUpgradeMiscParams extends AbstractWizStepMiscParams
 	{
 		$this->oWizard->SaveParameter('application_url', '');
 		$this->oWizard->SaveParameter('graphviz_path', '');
-		$this->oWizard->SaveParameter('use-symbolic-links', false);
+		$this->oWizard->SaveParameter('use_symbolic_links', false);
 		$this->oWizard->SaveParameter('force-uninstall', false);
 		return new WizardState(WizStepModulesChoice::class, 'start_upgrade');
 	}