diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/ProcessClosure.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/ProcessClosure.java
index cb264a1e18d..34caa9ac782 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/ProcessClosure.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/ProcessClosure.java
@@ -166,7 +166,7 @@ public class ProcessClosure {
 	
 	public boolean isAlive() {
 		if (fProcess != null) {
-			if (fOutputReader.isAlive() && fErrorReader.isAlive()) {
+			if (fOutputReader.isAlive() || fErrorReader.isAlive()) {
 				return true;
 			} else {
 				fProcess= null;