diff -up ./maven2/maven-core/src/main/java/org/apache/maven/cli/MavenCli.java.sav ./maven2/maven-core/src/main/java/org/apache/maven/cli/MavenCli.java

--- ./maven2/maven-core/src/main/java/org/apache/maven/cli/MavenCli.java.sav	2009-01-29 16:47:45.000000000 -0500

+++ ./maven2/maven-core/src/main/java/org/apache/maven/cli/MavenCli.java	2009-01-29 16:48:00.000000000 -0500

@@ -645,7 +645,7 @@ public class MavenCli

                 "Force the use of an alternate POM file." ).create( ALTERNATE_POM_FILE ) );

             options.addOption(

-                OptionBuilder.withLongOpt( "define" ).hasArg().withDescription( "Define a system property" ).create(

+                OptionBuilder.withLongOpt( "define" ).hasArgs(1).withDescription( "Define a system property" ).create(

                     SET_SYSTEM_PROPERTY ) );

             options.addOption(

                 OptionBuilder.withLongOpt( "offline" ).withDescription( "Work offline" ).create( OFFLINE ) );