diff --git a/core/org.eclipse.cdt.ui/META-INF/MANIFEST.MF b/core/org.eclipse.cdt.ui/META-INF/MANIFEST.MF
index 858c8afbc0a..4690cd405b2 100644
--- a/core/org.eclipse.cdt.ui/META-INF/MANIFEST.MF
+++ b/core/org.eclipse.cdt.ui/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.cdt.ui; singleton:=true
-Bundle-Version: 5.10.0.qualifier
+Bundle-Version: 5.9.0.qualifier
 Bundle-Activator: org.eclipse.cdt.ui.CUIPlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
diff --git a/core/org.eclipse.cdt.ui/pom.xml b/core/org.eclipse.cdt.ui/pom.xml
index 0ce150bb4bb..bd872aad568 100644
--- a/core/org.eclipse.cdt.ui/pom.xml
+++ b/core/org.eclipse.cdt.ui/pom.xml
@@ -11,7 +11,7 @@
 		<relativePath>../../pom.xml</relativePath>
 	</parent>
 
-	<version>5.10.0-SNAPSHOT</version>
+	<version>5.9.0-SNAPSHOT</version>
 	<artifactId>org.eclipse.cdt.ui</artifactId>
 	<packaging>eclipse-plugin</packaging>
 </project>
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/ui/PreferenceConstants.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/ui/PreferenceConstants.java
index cb0efb643d6..18f3399592a 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/ui/PreferenceConstants.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/ui/PreferenceConstants.java
@@ -992,7 +992,7 @@ public class PreferenceConstants {
 	/**
 	 * Style format code on save
 	 *
-	 * @since 5.10
+	 * @since 5.9
 	 */
 	public final static String FORMAT_SOURCE_CODE = "formatSourceCode"; //$NON-NLS-1$