diff --git a/src/Mod/Assembly/Gui/CMakeLists.txt b/src/Mod/Assembly/Gui/CMakeLists.txt
index a7dc9c9f99..b20c30bad8 100644
--- a/src/Mod/Assembly/Gui/CMakeLists.txt
+++ b/src/Mod/Assembly/Gui/CMakeLists.txt
@@ -3,6 +3,7 @@ include_directories(
     ${CMAKE_CURRENT_BINARY_DIR}
     ${COIN3D_INCLUDE_DIRS}
     ${OCC_INCLUDE_DIR}
+    ${PYTHON_INCLUDE_DIRS}
 )
 
 set(AssemblyGui_LIBS