diff --git a/framework.mk b/framework.mk
index ee0a7ba4a..643eb74fe 100644
--- a/framework.mk
+++ b/framework.mk
@@ -34,7 +34,7 @@ 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, host)
+$(error invalid OS_FSFW specified, valid OS_FSFW are rtems, linux, freeRTOS, host)
 endif
 
 CXXSRC += $(wildcard $(FRAMEWORK_PATH)/parameters/*.cpp)