diff --git a/Classes/PhDThesisPSnPDF.cls b/Classes/PhDThesisPSnPDF.cls
index ebdcf72..b01aaac 100644
--- a/Classes/PhDThesisPSnPDF.cls
+++ b/Classes/PhDThesisPSnPDF.cls
@@ -427,8 +427,8 @@ supported!}
   \else
     \ifuseCustomBib
        \AtBeginDocument{
-          \@ifpackageloaded{natbib}{true}{
-            \@ifpackageloaded{biblatex}{true}{
+          \@ifpackageloaded{natbib}{}{
+            \@ifpackageloaded{biblatex}{}{
               \ClassWarning{PhDThesisPSnPDF}{%
                 Custom bibliography is chosen, but no corresponding package 
                 (biblatex/natbib) has been loaded. Please load the
diff --git a/thesis.pdf b/thesis.pdf
index fee48ea..66d3a82 100644
Binary files a/thesis.pdf and b/thesis.pdf differ
diff --git a/thesis.ps b/thesis.ps
index 163251d..05b31aa 100644
--- a/thesis.ps
+++ b/thesis.ps
@@ -1,7 +1,7 @@
 %!PS-Adobe-2.0
 %%Creator: dvips(k) 5.993 Copyright 2013 Radical Eye Software
 %%Title: thesis.dvi
-%%CreationDate: Sun Jul  6 19:37:55 2014
+%%CreationDate: Thu Jul 10 00:02:34 2014
 %%Pages: 41
 %%PageOrder: Ascend
 %%BoundingBox: 0 0 596 842
@@ -13,7 +13,7 @@
 %DVIPSWebPage: (www.radicaleye.com)
 %DVIPSCommandLine: dvips -z -o thesis.ps.temp -ta4 thesis.dvi
 %DVIPSParameters: dpi=600
-%DVIPSSource:  TeX output 2014.07.06:1937
+%DVIPSSource:  TeX output 2014.07.10:0002
 %%BeginProcSet: tex.pro 0 0
 %!
 /TeXDict 300 dict def TeXDict begin/N{def}def/B{bind def}N/S{exch}N/X{S