From fba00a82017e78b111e9d454e39320d4dadf049d Mon Sep 17 00:00:00 2001
From: Stefan Kolb <stefan-kolb@web.de>
Date: Sun, 20 Mar 2016 12:39:06 +0100
Subject: [PATCH] Fix #972 Correct boolean logic

---
 src/main/java/net/sf/jabref/gui/desktop/os/Linux.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/net/sf/jabref/gui/desktop/os/Linux.java b/src/main/java/net/sf/jabref/gui/desktop/os/Linux.java
index 981b69e6f75..8eddfbe1a83 100644
--- a/src/main/java/net/sf/jabref/gui/desktop/os/Linux.java
+++ b/src/main/java/net/sf/jabref/gui/desktop/os/Linux.java
@@ -14,7 +14,7 @@ public void openFile(String filePath, String fileType) throws IOException {
         ExternalFileType type = ExternalFileTypes.getInstance().getExternalFileTypeByExt(fileType);
         String viewer;
 
-        if (type == null && !type.getOpenWithApplication().isPresent()) {
+        if (type == null || !type.getOpenWithApplication().isPresent()) {
             viewer = "xdg-open";
         } else {
             viewer = type.getOpenWithApplication().get();