diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/editors/AbstractDebugTextHover.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/editors/AbstractDebugTextHover.java
index 9366ef75148..73e3aa01e61 100644
--- a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/editors/AbstractDebugTextHover.java
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/ui/editors/AbstractDebugTextHover.java
@@ -249,6 +249,9 @@ public abstract class AbstractDebugTextHover implements ICEditorTextHover, IText
 				IASTName name= ast.getNodeSelector(null).findEnclosingName(offset, length);
 				if (name != null) {
 				    IASTImageLocation imageLoc = name.getImageLocation();
+				    if (imageLoc == null) {
+				        return Status.CANCEL_STATUS;
+				    }
 				    int kind = imageLoc.getLocationKind();
 				    switch (kind) {
                     case IASTImageLocation.ARGUMENT_TO_MACRO_EXPANSION: