diff --git a/sdk/build.xml b/sdk/build.xml
index f384c50a6..d73289d4a 100644
--- a/sdk/build.xml
+++ b/sdk/build.xml
@@ -153,12 +153,20 @@
                                 match="OpenIDE-Module-Implementation-Version:(.*)"
                                 replace="OpenIDE-Module-Specification-Version: ${plugins.version}"
                                 byline="true"/>
+                <replaceregexp file="${module_dir}/nbproject/project.properties"
+                                match="spec.version.base"
+                                replace="#spec.version.base"
+                                byline="true"/>
             </then>
             <else>
                 <replaceregexp file="${module_dir}/manifest.mf"
                                 match="OpenIDE-Module-Specification-Version:(.*)"
                                 replace="OpenIDE-Module-Implementation-Version: 0"
                                 byline="true"/>
+                <replaceregexp file="${module_dir}/nbproject/project.properties"
+                                match="#spec.version.base"
+                                replace="spec.version.base"
+                                byline="true"/>
             </else>
         </if>
     </target>