diff --git a/framework.mk b/framework.mk
index a5a653641..ee0a7ba4a 100644
--- a/framework.mk
+++ b/framework.mk
@@ -1,5 +1,5 @@
-# This file needs FRAMEWORK_PATH and API set correctly
-# Valid API settings: rtems, linux, freeRTOS
+# This file needs FRAMEWORK_PATH and OS_FSFW set correctly by another Makefile.
+# Valid API settings: rtems, linux, freeRTOS, host
 
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/action/*.cpp)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/container/*.cpp)
@@ -12,7 +12,6 @@ CXXSRC += $(wildcard $(FRAMEWORK_PATH)/devicehandlers/*.cpp)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/events/*.cpp)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/events/eventmatching/*.cpp)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/fdir/*.cpp)
-CXXSRC += $(wildcard $(FRAMEWORK_PATH)/framework.mk/*.cpp)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/globalfunctions/*.cpp)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/globalfunctions/matching/*.cpp)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/globalfunctions/math/*.cpp)
@@ -26,14 +25,16 @@ CXXSRC += $(wildcard $(FRAMEWORK_PATH)/objectmanager/*.cpp)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/osal/*.cpp)
 
 # select the OS
-ifeq ($(OS),rtems)
+ifeq ($(OS_FSFW),rtems)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/osal/rtems/*.cpp)
-else ifeq ($(OS),linux)
+else ifeq ($(OS_FSFW),linux)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/osal/linux/*.cpp)
-else ifeq ($(OS),freeRTOS)
+else ifeq ($(OS_FSFW),freeRTOS)
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/osal/FreeRTOS/*.cpp)
+else ifeq ($(OS_FSFW),host)
+CXXSRC += $(wildcard $(FRAMEWORK_PATH)/osal/host/*.cpp)
 else
-$(error invalid OS specified, valid OS are rtems, linux, freeRTOS)
+$(error invalid OS specified, valid OS are rtems, linux, freeRTOS, host)
 endif
 
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/parameters/*.cpp)