diff --git a/core/plugins/org.eclipse.dltk.debug.ui/src/org/eclipse/dltk/internal/debug/ui/interpreters/AbstractInterpreterEnvironmentVariablesBlock.java b/core/plugins/org.eclipse.dltk.debug.ui/src/org/eclipse/dltk/internal/debug/ui/interpreters/AbstractInterpreterEnvironmentVariablesBlock.java
index 787df86..bdbb5d5 100644
--- a/core/plugins/org.eclipse.dltk.debug.ui/src/org/eclipse/dltk/internal/debug/ui/interpreters/AbstractInterpreterEnvironmentVariablesBlock.java
+++ b/core/plugins/org.eclipse.dltk.debug.ui/src/org/eclipse/dltk/internal/debug/ui/interpreters/AbstractInterpreterEnvironmentVariablesBlock.java
@@ -220,13 +220,9 @@
 	 * Saves settings in the given working copy
 	 */
 	public void performApply(IInterpreterInstall install) {
-		if (isDefaultLocations()) {
-			install.setEnvironmentVariables(null);
-		} else {
-			EnvironmentVariable[] libs = fEnvironmentVariablesContentProvider
-					.getVariables();
-			install.setEnvironmentVariables(libs);
-		}
+		EnvironmentVariable[] libs = fEnvironmentVariablesContentProvider
+				.getVariables();
+		install.setEnvironmentVariables(libs);
 	}
 
 	/**