diff --git a/NDHTMLtoPDF.m b/NDHTMLtoPDF.m
index 7bdc154..ff3de35 100644
--- a/NDHTMLtoPDF.m
+++ b/NDHTMLtoPDF.m
@@ -212,11 +212,18 @@ - (void)terminateWebTask
     self.webview.delegate = nil;
     [self.webview removeFromSuperview];
     
-    [self.view removeFromSuperview];
+    if (self.view) {
+        [self.view removeFromSuperview];
+    }
     
     self.webview = nil;
 }
 
+- (void) dealloc
+{
+    [self terminateWebTask];
+}
+
 @end
 
 @implementation UIPrintPageRenderer (PDF)