diff --git a/ant/org.eclipse.ant.core/src_ant/org/eclipse/ant/internal/core/ant/InternalAntRunner.java b/ant/org.eclipse.ant.core/src_ant/org/eclipse/ant/internal/core/ant/InternalAntRunner.java
index d517ec8..7f13cd8 100644
--- a/ant/org.eclipse.ant.core/src_ant/org/eclipse/ant/internal/core/ant/InternalAntRunner.java
+++ b/ant/org.eclipse.ant.core/src_ant/org/eclipse/ant/internal/core/ant/InternalAntRunner.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- *  Copyright (c) 2000, 2015 IBM Corporation and others.
+ *  Copyright (c) 2000, 2017 IBM Corporation and others.
  *  All rights reserved. This program and the accompanying materials
  *  are made available under the terms of the Eclipse Public License v1.0
  *  which accompanies this distribution, and is available at
@@ -71,6 +71,7 @@
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.variables.VariablesPlugin;
 import org.osgi.framework.Bundle;
+import org.osgi.framework.Version;
 
 /**
  * Eclipse application entry point into Ant. Derived from the original Ant Main class to ensure that the functionality is equivalent when running in
@@ -1017,7 +1018,9 @@
 	 */
 	protected boolean isVersionCompatible(String comparison) {
 		String version = getAntVersionNumber();
-		return version.compareTo(comparison) >= 0;
+		Version osgiVersion = new Version(version);
+		Version osgiComparison = new Version(comparison);
+		return osgiVersion.compareTo(osgiComparison) >= 0;
 	}
 
 	/**
diff --git a/ant/org.eclipse.ant.launching/remote/org/eclipse/ant/internal/launching/remote/InternalAntRunner.java b/ant/org.eclipse.ant.launching/remote/org/eclipse/ant/internal/launching/remote/InternalAntRunner.java
index e3e6588..0daf973 100644
--- a/ant/org.eclipse.ant.launching/remote/org/eclipse/ant/internal/launching/remote/InternalAntRunner.java
+++ b/ant/org.eclipse.ant.launching/remote/org/eclipse/ant/internal/launching/remote/InternalAntRunner.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2016 IBM Corporation and others.
+ * Copyright (c) 2000, 2017 IBM Corporation and others.
  * Portions Copyright  2000-2005 The Apache Software Foundation
  * All rights reserved. This program and the accompanying materials are made 
  * available under the terms of the Apache Software License v2.0 which 
@@ -29,7 +29,9 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
+import java.util.NoSuchElementException;
 import java.util.Properties;
+import java.util.StringTokenizer;
 import java.util.Vector;
 
 import org.apache.tools.ant.AntTypeDefinition;
@@ -691,7 +693,93 @@
 	 */
 	private boolean isVersionCompatible(String comparison) {
 		String version = getAntVersionNumber();
-		return version.compareTo(comparison) >= 0;
+		Version osgiVersion = new Version(version);
+		Version osgiComparison = new Version(comparison);
+		return osgiVersion.compareTo(osgiComparison) >= 0;
+	}
+
+	class Version {
+		private final int major;
+		private final int minor;
+		private final int micro;
+		private final String qualifier;
+		private static final String SEPARATOR = "."; //$NON-NLS-1$
+
+		public int compareTo(Version other) {
+			if (other == this) { // quick test
+				return 0;
+			}
+
+			int result = major - other.major;
+			if (result != 0) {
+				return result;
+			}
+
+			result = minor - other.minor;
+			if (result != 0) {
+				return result;
+			}
+
+			result = micro - other.micro;
+			if (result != 0) {
+				return result;
+			}
+
+			return qualifier.compareTo(other.qualifier);
+		}
+
+		public Version(String version) {
+			int maj = 0;
+			int min = 0;
+			int mic = 0;
+			String qual = ""; //$NON-NLS-1$
+
+			try {
+				StringTokenizer st = new StringTokenizer(version, SEPARATOR, true);
+				maj = parseInt(st.nextToken(), version);
+
+				if (st.hasMoreTokens()) { // minor
+					st.nextToken(); // consume delimiter
+					min = parseInt(st.nextToken(), version);
+
+					if (st.hasMoreTokens()) { // micro
+						st.nextToken(); // consume delimiter
+						mic = parseInt(st.nextToken(), version);
+
+						if (st.hasMoreTokens()) { // qualifier separator
+							st.nextToken(); // consume delimiter
+							qual = st.nextToken(""); // remaining string //$NON-NLS-1$
+
+							if (st.hasMoreTokens()) { // fail safe
+								throw new IllegalArgumentException("invalid version \"" + version + "\": invalid format"); //$NON-NLS-1$ //$NON-NLS-2$
+							}
+						}
+					}
+				}
+			}
+			catch (NoSuchElementException e) {
+				IllegalArgumentException iae = new IllegalArgumentException("invalid version \"" + version + "\": invalid format");//$NON-NLS-1$ //$NON-NLS-2$
+				iae.initCause(e);
+				throw iae;
+			}
+
+			major = maj;
+			minor = min;
+			micro = mic;
+			qualifier = qual;
+			// validate();
+		}
+
+		private int parseInt(String value, String version) {
+			try {
+				return Integer.parseInt(value);
+			}
+			catch (NumberFormatException e) {
+				IllegalArgumentException iae = new IllegalArgumentException("invalid version \"" + version + "\": non-numeric \"" + value + "\""); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
+				iae.initCause(e);
+				throw iae;
+			}
+		}
 	}
 
 	@SuppressWarnings("unused")