diff --git a/cartographer_rviz/CMakeLists.txt b/cartographer_rviz/CMakeLists.txt
index 94a3299..84efda5 100644
--- a/cartographer_rviz/CMakeLists.txt
+++ b/cartographer_rviz/CMakeLists.txt
@@ -40,12 +40,15 @@ set(CMAKE_AUTOMOC ON)
 if(rviz_QT_VERSION VERSION_LESS "5")
   message(STATUS "Using Qt4 based on the rviz_QT_VERSION: ${rviz_QT_VERSION}")
   find_package(Qt4 ${rviz_QT_VERSION} EXACT REQUIRED QtCore QtGui)
+  include_directories(${Qt4_INCLUDE_DIRS})
   include(${QT_USE_FILE})
 else()
   message(STATUS "Using Qt5 based on the rviz_QT_VERSION: ${rviz_QT_VERSION}")
   find_package(Qt5 ${rviz_QT_VERSION} EXACT REQUIRED Core Widgets)
   find_package(Qt5Widgets REQUIRED)
   set(QT_LIBRARIES Qt5::Widgets)
+  include_directories(${Qt5Widgets_INCLUDE_DIRS})
+  include_directories(${Qt5_INCLUDE_DIRS})
 endif()
 add_definitions(-DQT_NO_KEYWORDS)
 
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 6cedaee..54acb01 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -65,6 +65,7 @@ We recommend using `wstool <http://wiki.ros.org/wstool>`_ and `rosdep
     wstool update -t src
 
     # Install deb dependencies.
+    rosdep init
     rosdep update
     rosdep install --from-paths src --ignore-src --rosdistro=${ROS_DISTRO} -y