diff --git a/src/Mod/Assembly/Gui/CMakeLists.txt b/src/Mod/Assembly/Gui/CMakeLists.txt
index 6dcc4acb25..a7dc9c9f99 100644
--- a/src/Mod/Assembly/Gui/CMakeLists.txt
+++ b/src/Mod/Assembly/Gui/CMakeLists.txt
@@ -1,6 +1,7 @@
 include_directories(
     ${CMAKE_BINARY_DIR}
     ${CMAKE_CURRENT_BINARY_DIR}
+    ${COIN3D_INCLUDE_DIRS}
     ${OCC_INCLUDE_DIR}
 )