diff --git a/CMakeLists.txt b/CMakeLists.txt
index 12657be..c14ca89 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,5 @@
 cmake_minimum_required(VERSION 3.16)
+include(GNUInstallDirs)
 
 project( QwtPlot3D
   VERSION 0.3.0
@@ -104,8 +105,12 @@ set( HEADERS
   "include/qwt3d_io_gl2ps.h"
   )
 configure_file( "include/qwt3d_version.h.in" "qwt3d_version.h" @ONLY )
+list( APPEND HEADERS
+    "${CMAKE_BINARY_DIR}/qwt3d_version.h"
+    )
 
 add_library( qwtplot3d ${SRCS} ${HEADERS} )
+set_target_properties( qwtplot3d PROPERTIES PUBLIC_HEADER "${HEADERS}" )
 
 target_link_libraries( qwtplot3d
   Qt${QT_VERSION_MAJOR}::Core
diff --git a/doc/Doxyfile.doxygen b/doc/Doxyfile.doxygen
index 8910fb7..aab863a 100644
--- a/doc/Doxyfile.doxygen
+++ b/doc/Doxyfile.doxygen
@@ -181,7 +181,7 @@ ENABLE_PREPROCESSING   = YES
 MACRO_EXPANSION        = NO
 EXPAND_ONLY_PREDEF     = NO
 SEARCH_INCLUDES        = YES
-INCLUDE_PATH           = V:/cvs/qwtplot3d/include/
+INCLUDE_PATH           = ../include/
 INCLUDE_FILE_PATTERNS  = *.h
 PREDEFINED             = QWT3D_NOT_FOR_DOXYGEN \
                          QT_VERSION=0x040000
diff --git a/include/qwt3d_function.h b/include/qwt3d_function.h
index 640ae39..807d29c 100644
--- a/include/qwt3d_function.h
+++ b/include/qwt3d_function.h
@@ -2,6 +2,7 @@
 #define qwt3d_function_h
 
 #include "qwt3d_gridmapping.h"
+#include <cstdio>
 
 namespace Qwt3D {