diff --git a/.travis.yml b/.travis.yml
index 23524786..aa1c8a3a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,17 @@
-language: cpp
+language:
+- c
+- cpp
 
 # clang is not supported for poppler
 compiler: gcc
 
 os: linux
 
+sudo: false
+
+cache:
+- ccache
+
 addons:
   apt:
     packages:
@@ -20,6 +27,7 @@ addons:
     - fontconfig
     - librsvg2-dev
     - glade-gtk2
+    - libglade2-dev
 #    - libpoppler-dev
 #    - libpoppler-cpp-dev
 #    - libpoppler-glib-dev
@@ -27,9 +35,6 @@ addons:
     - boost-latest
     - kalakris-cmake
 
-before_install:
-  - "sudo apt-get install -y libglade2-dev"
-
 before_script:
   - "mkdir build"
   - "cd build"
diff --git a/src/pdf/popplerdirect/PdfXRef.cpp b/src/pdf/popplerdirect/PdfXRef.cpp
index e5e281d3..4558e6ff 100644
--- a/src/pdf/popplerdirect/PdfXRef.cpp
+++ b/src/pdf/popplerdirect/PdfXRef.cpp
@@ -41,7 +41,7 @@ void PdfXRef::setXref(int id, int ref)
 
 	if (id < 1)
 	{
-		g_warning("PdfXRef::setXref try to set XREF-ID: %i it needs to be at least 1", id, this->xrefNr);
+		g_warning("PdfXRef::setXref try to set XREF-ID: %i it needs to be at least 1", id);
 		return;
 	}
 	if (id - 1 >= this->xrefNr)
diff --git a/src/pdf/popplerdirect/poppler/XojPopplerDocument.cpp b/src/pdf/popplerdirect/poppler/XojPopplerDocument.cpp
index 0bedecff..cda8f840 100644
--- a/src/pdf/popplerdirect/poppler/XojPopplerDocument.cpp
+++ b/src/pdf/popplerdirect/poppler/XojPopplerDocument.cpp
@@ -223,7 +223,7 @@ XojPopplerPage* XojPopplerDocument::getPage(size_t page)
 
 	if (page == size_t_npos || page >= this->getPageCount())
 	{
-		g_critical("Document::getPdfPage(%i) out of range! (count=%i)", page, this->getPageCount());
+		g_critical("Document::getPdfPage(%lu) out of range! (count=%lu)", page, this->getPageCount());
 		return NULL;
 	}