diff --git a/buildADQL.xml b/buildADQL.xml
index 6575261b80c6eaac3a09f0fdab9476e37f6b2be3..fd486b1ca049c206d66b697d8162c53efb021a85 100644
--- a/buildADQL.xml
+++ b/buildADQL.xml
@@ -87,7 +87,7 @@
 	
 	<target name="compileLib" depends="clean,junitValidation" description="Build all the classes of the ADQL library. This target is particularly usefull because it lets highlighting missing dependencies.">
 		<mkdir dir="${compileDir}" />
-		<javac destdir="${compileDir}" srcdir="${srcDir}" includes="${includesList}" includeantruntime="false" encoding="utf8" bootclasspath="${adql.bootclasspath}">
+		<javac destdir="${compileDir}" srcdir="${srcDir}" includes="${includesList}" includeantruntime="false" encoding="utf8" bootclasspath="${adql.bootclasspath}" debug="true">
 			<classpath refid="adql.classpath" />
 		</javac>
 	</target>
diff --git a/buildTAP.xml b/buildTAP.xml
index 25b41b49baa4adebb0dc52b570826cb5b8200f51..893615d8e6af6644fb5ecd1fdf37530d6e90f3d3 100644
--- a/buildTAP.xml
+++ b/buildTAP.xml
@@ -112,7 +112,7 @@
 	
 	<target name="compileLib" depends="clean,junitValidation" description="Build all the classes of the TAP library. This target is particularly usefull because it lets highlighting missing dependencies.">
 		<mkdir dir="${compileDir}" />
-		<javac destdir="${compileDir}" srcdir="${srcDir}" includes="${includesList}" includeantruntime="false" encoding="utf8">
+		<javac destdir="${compileDir}" srcdir="${srcDir}" includes="${includesList}" includeantruntime="false" encoding="utf8" debug="true">
 			<classpath refid="tap.classpath" />
 		</javac>
 	</target>
diff --git a/buildUWS.xml b/buildUWS.xml
index 2f1a9fbc183d759dec236c3c4d87136b95eb3b6a..f3cf96ff374fb351342119f5fc18a481374c9651 100644
--- a/buildUWS.xml
+++ b/buildUWS.xml
@@ -79,7 +79,7 @@
 	
 	<target name="compileLib" depends="clean,junitValidation" description="Build all the classes of the UWS library. This target is particularly usefull because it lets highlighting missing dependencies.">
 		<mkdir dir="${compileDir}" />
-		<javac destdir="${compileDir}" srcdir="${srcDir}" includes="${includesList}" includeantruntime="false" encoding="utf8">
+		<javac destdir="${compileDir}" srcdir="${srcDir}" includes="${includesList}" includeantruntime="false" encoding="utf8" debug="true">
 			<classpath refid="uws.classpath" />
 		</javac>
 	</target>