--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -154,8 +154,8 @@ target_sources(CsCore
 
 target_include_directories(CsCore
    PUBLIC
-   $<INSTALL_INTERFACE:include>
-   $<INSTALL_INTERFACE:include/QtCore>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtCore>
 )
 
 if(MSVC)
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -179,7 +179,7 @@ target_sources(CsGui
 
 target_include_directories(CsGui
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtGui>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtGui>
    ${OPENGL_INCLUDE_DIR}
 )
 
--- a/src/multimedia/CMakeLists.txt
+++ b/src/multimedia/CMakeLists.txt
@@ -81,7 +81,7 @@ target_link_libraries(CsMultimedia
 target_include_directories(CsMultimedia
    PUBLIC
    ${GSTREAMER_INCLUDE_DIRS}
-   $<INSTALL_INTERFACE:include/QtMultimedia>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtMultimedia>
 )
 
 set_target_properties(CsMultimedia
--- a/src/network/CMakeLists.txt
+++ b/src/network/CMakeLists.txt
@@ -92,7 +92,7 @@ target_link_libraries(CsNetwork
 
 target_include_directories(CsNetwork
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtNetwork>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtNetwork>
 )
 
 set_target_properties(CsNetwork
--- a/src/opengl/CMakeLists.txt
+++ b/src/opengl/CMakeLists.txt
@@ -130,7 +130,7 @@ function_variable_fixup("${EXTRA_OPENGL_LDFLAGS}"  EXTRA_OPENGL_LDFLAGS)
 
 target_include_directories(CsOpenGL
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtOpenGL>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtOpenGL>
 )
 
 target_link_libraries(CsOpenGL
--- a/src/script/CMakeLists.txt
+++ b/src/script/CMakeLists.txt
@@ -569,7 +569,7 @@ target_sources(CsScript
 
 target_include_directories(CsScript
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtScript>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtScript>
 )
 
 target_link_libraries(CsScript
--- a/src/sql/CMakeLists.txt
+++ b/src/sql/CMakeLists.txt
@@ -76,7 +76,7 @@ target_link_libraries(CsSql
 
 target_include_directories(CsSql
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtSql>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtSql>
 )
 
 set_target_properties(CsSql
--- a/src/svg/CMakeLists.txt
+++ b/src/svg/CMakeLists.txt
@@ -89,7 +89,7 @@ target_sources(CsSvg
 
 target_include_directories(CsSvg
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtSvg>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtSvg>
 )
 
 target_link_libraries(CsSvg
--- a/src/webkit/CMakeLists.txt
+++ b/src/webkit/CMakeLists.txt
@@ -2432,7 +2432,7 @@ function_variable_fixup("${EXTRA_WEBKIT_LDFLAGS}"  EXTRA_WEBKIT_LDFLAGS)
 
 target_include_directories(CsWebKit
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtWebKit>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtWebKit>
 )
 
 target_link_libraries(CsWebKit
--- a/src/xml/CMakeLists.txt
+++ b/src/xml/CMakeLists.txt
@@ -44,7 +44,7 @@ target_sources(CsXml
 
 target_include_directories(CsXml
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtXml>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtXml>
 )
 
 target_link_libraries(CsXml
--- a/src/xmlpatterns/CMakeLists.txt
+++ b/src/xmlpatterns/CMakeLists.txt
@@ -67,7 +67,7 @@ target_sources(CsXmlPatterns
 
 target_include_directories(CsXmlPatterns
    PUBLIC
-   $<INSTALL_INTERFACE:include/QtXmlPatterns>
+   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/QtXmlPatterns>
 )
 
 target_link_libraries(CsXmlPatterns