--- src/plugins/io_cube/CMakeLists.txt	2018-10-19 20:28:51.518629544 +0300
+++ src/plugins/io_cube/CMakeLists.txt	2018-10-19 21:14:24.345583573 +0300
@@ -19,6 +19,12 @@
    PREFIX ""
 )
 
+target_include_directories(cubemodel PRIVATE
+  ${PROJECT_SOURCE_DIR}/src
+  ${Qt5Core_INCLUDE_DIRS}
+  ${Qt5Gui_INCLUDE_DIRS}
+)
+
 #### Cube
 
 # Meta-Objects