diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87232dd..caa0c40 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,24 @@
+#[[**************************************************************************
+* libragephoto RAGE Photo Parser
+* Copyright (C) 2021 Syping
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*
+* This software is provided as-is, no warranties are given to you, we are not
+* responsible for anything with use of the software, you are self responsible.
+****************************************************************************]]
+
 cmake_minimum_required(VERSION 3.7)
 project(ragephoto VERSION 0.1 LANGUAGES CXX)
+include(GNUInstallDirs)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_CXX_STANDARD 11)
@@ -38,7 +57,7 @@ set(RAGEPHOTO_SOURCES
 option(BUILD_SHARED "Build libragephoto as shared library" ON)
 if (BUILD_SHARED)
     add_library(ragephoto SHARED ${RAGEPHOTO_HEADERS} ${RAGEPHOTO_SOURCES})
-    set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
+    set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
     set(LIBRAGEPHOTO_LIBTYPE -DLIBRAGEPHOTO_SHARED)
 else()
     add_library(ragephoto STATIC ${RAGEPHOTO_HEADERS} ${RAGEPHOTO_SOURCES})
@@ -60,9 +79,9 @@ target_compile_definitions(ragephoto PRIVATE
 target_compile_definitions(ragephoto PUBLIC
     ${LIBRAGEPHOTO_LIBTYPE}
 )
-install(TARGETS ragephoto DESTINATION lib)
-install(FILES ${RAGEPHOTO_HEADERS} DESTINATION include)
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/ragephoto.pc DESTINATION lib/pkgconfig)
+install(TARGETS ragephoto DESTINATION ${CMAKE_INSTALL_LIBDIR})
+install(FILES ${RAGEPHOTO_HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/ragephoto.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 
 option(WITH_GTK_EXAMPLE "Build libragephoto with GTK Photo Viewer" OFF)
 if (WITH_GTK_EXAMPLE)
@@ -74,12 +93,16 @@ if (WITH_QT_EXAMPLE)
     add_subdirectory(examples/ragephoto-qtviewer)
 endif()
 
-option(WITH_EXTRACT "Build libragephoto with ragephoto-extract" ON)
+if (CMAKE_PROJECT_NAME EQUAL "ragephoto")
+    option(WITH_EXTRACT "Build libragephoto with ragephoto-extract" ON)
+else()
+    option(WITH_EXTRACT "Build libragephoto with ragephoto-extract" OFF)
+endif()
 if (WITH_EXTRACT)
     set(EXTRACT_SOURCES
         src/RagePhoto-Extract.cpp
     )
     add_executable(ragephoto-extract ${RAGEPHOTO_HEADERS} ${EXTRACT_SOURCES})
     target_link_libraries(ragephoto-extract PRIVATE ragephoto)
-    install(TARGETS ragephoto-extract DESTINATION bin)
+    install(TARGETS ragephoto-extract DESTINATION ${CMAKE_INSTALL_BINDIR})
 endif()
diff --git a/examples/ragephoto-gtkviewer/CMakeLists.txt b/examples/ragephoto-gtkviewer/CMakeLists.txt
index 3f61c81..707ae22 100644
--- a/examples/ragephoto-gtkviewer/CMakeLists.txt
+++ b/examples/ragephoto-gtkviewer/CMakeLists.txt
@@ -1,5 +1,24 @@
+#[[**************************************************************************
+* libragephoto RAGE Photo Parser
+* Copyright (C) 2021 Syping
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*
+* This software is provided as-is, no warranties are given to you, we are not
+* responsible for anything with use of the software, you are self responsible.
+****************************************************************************]]
+
 cmake_minimum_required(VERSION 3.7)
 project(ragephoto-gtkviewer LANGUAGES CXX)
+include(GNUInstallDirs)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_CXX_STANDARD 11)
@@ -31,4 +50,4 @@ if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.13.0")
     target_link_directories(ragephoto-gtkviewer PRIVATE ${GTKMM_LIBRARY_DIRS} ${RAGEPHOTO_LIBRARY_DIRS})
 endif()
 target_include_directories(ragephoto-gtkviewer PRIVATE ${GTKMM_INCLUDE_DIRS} ${RAGEPHOTO_INCLUDE_DIRS})
-install(TARGETS ragephoto-gtkviewer DESTINATION bin)
+install(TARGETS ragephoto-gtkviewer DESTINATION ${CMAKE_INSTALL_BINDIR})
diff --git a/examples/ragephoto-qtviewer/CMakeLists.txt b/examples/ragephoto-qtviewer/CMakeLists.txt
index 407c0fb..6d1ea5c 100644
--- a/examples/ragephoto-qtviewer/CMakeLists.txt
+++ b/examples/ragephoto-qtviewer/CMakeLists.txt
@@ -1,5 +1,24 @@
+#[[**************************************************************************
+* libragephoto RAGE Photo Parser
+* Copyright (C) 2021 Syping
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*
+* This software is provided as-is, no warranties are given to you, we are not
+* responsible for anything with use of the software, you are self responsible.
+****************************************************************************]]
+
 cmake_minimum_required(VERSION 3.7)
 project(ragephoto-qtviewer LANGUAGES CXX)
+include(GNUInstallDirs)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_CXX_STANDARD 11)
@@ -32,3 +51,4 @@ if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.13.0")
     target_link_directories(ragephoto-qtviewer PRIVATE ${RAGEPHOTO_LIBRARY_DIRS})
 endif()
 target_include_directories(ragephoto-qtviewer PRIVATE ${RAGEPHOTO_INCLUDE_DIRS})
+install(TARGETS ragephoto-qtviewer DESTINATION ${CMAKE_INSTALL_BINDIR})
diff --git a/src/RagePhoto.cpp b/src/RagePhoto.cpp
index 8e081a5..daf5f74 100644
--- a/src/RagePhoto.cpp
+++ b/src/RagePhoto.cpp
@@ -125,7 +125,7 @@ bool RagePhoto::load(const char *data, size_t length)
         p_headerSum = charToUInt32LE(uInt32Buffer);
 #endif
 
-        if (format == static_cast<uint32_t>(PhotoFormat::RDR2))
+        if (p_photoFormat == PhotoFormat::RDR2)
             pos = pos + 8;
         uint32_t headerSize = pos;
 
diff --git a/src/ragephoto.pc.in b/src/ragephoto.pc.in
index 7414504..f836f20 100644
--- a/src/ragephoto.pc.in
+++ b/src/ragephoto.pc.in
@@ -1,6 +1,6 @@
 prefix=@CMAKE_INSTALL_PREFIX@
-libdir=${prefix}/lib
-includedir=${prefix}/include
+libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
 
 Name: libragephoto
 Description: Open Source RAGE Photo Parser for GTA V