diff --git a/src/calamares/CMakeLists.txt b/src/calamares/CMakeLists.txt
index 4ecc61230..3be6b92a3 100644
--- a/src/calamares/CMakeLists.txt
+++ b/src/calamares/CMakeLists.txt
@@ -64,9 +64,4 @@ if(BUILD_TESTING)
 
     add_executable(test_conf test_conf.cpp)
     target_link_libraries(test_conf PUBLIC yamlcpp::yamlcpp ${qtname}::Core)
-
-    if(WITH_PYBIND11)
-        target_compile_definitions(loadmodule PRIVATE WITH_PYBIND11=1)
-    endif()
-
 endif()
diff --git a/src/libcalamaresui/CMakeLists.txt b/src/libcalamaresui/CMakeLists.txt
index 66a0e4c6b..ad2e2ea96 100644
--- a/src/libcalamaresui/CMakeLists.txt
+++ b/src/libcalamaresui/CMakeLists.txt
@@ -63,9 +63,6 @@ if(WITH_QML)
     target_link_libraries(calamaresui PUBLIC ${qtname}::QuickWidgets)
 endif()
 
-if(WITH_PYBIND11)
-    target_compile_definitions(calamaresui PRIVATE WITH_PYBIND11=1)
-endif()
 set_target_properties(
     calamaresui
     PROPERTIES