diff --git a/pkgs/applications/networking/instant-messengers/pidgin-plugins/pidgin-latex/default.nix b/pkgs/applications/networking/instant-messengers/pidgin-plugins/pidgin-latex/default.nix
index 9358d4c528a..fa6e123c45b 100644
--- a/pkgs/applications/networking/instant-messengers/pidgin-plugins/pidgin-latex/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pidgin-plugins/pidgin-latex/default.nix
@@ -10,7 +10,9 @@ stdenv.mkDerivation {
 
   preBuild = "sed -e '/^PREFIX/d' -i Makefile ; 
 	sed -e 's@/bin/bash@/var/run/current-system/sw&@; s@/dev/stdin@/proc/self/fd/0@' -i pidgin-latex-convert.sh;
-	sed -e 's@^latex.*@& ; if let \$?; then rm /tmp/pidgin-latex-tmp.png; exit 1; fi; @' -i pidgin-latex-convert.sh ; ";
+	sed -e 's@^latex.*@pdf& ; if let \$?; then rm /tmp/pidgin-latex-tmp.png; exit 1; fi; @' -i pidgin-latex-convert.sh ; 
+	sed -e 's@[.]dvi@.pdf@' -i pidgin-latex-convert.sh;
+	";
 
   makeFlags="PREFIX=\$(out)";