diff --git a/develop/doxygen/doxygen.conf b/develop/doxygen/doxygen.conf
index 7a866bea4..ce810c27b 100644
--- a/develop/doxygen/doxygen.conf
+++ b/develop/doxygen/doxygen.conf
@@ -24,5 +24,7 @@ if [[ $libdir = *lib64 ]]; then
 fi
 
 if pkginstalled qt3; then
+	pkgprefix -t qt3
 	var_append confopt ' ' '--with-doxywizard'
+	var_append CXX_WRAPPER_APPEND ' ' "-I$root$( pkgprefix includedir qt3 )"
 fi