diff --git a/osal/host/CMakeLists.txt b/osal/host/CMakeLists.txt
index 3efd91d2e..d54cfac8b 100644
--- a/osal/host/CMakeLists.txt
+++ b/osal/host/CMakeLists.txt
@@ -10,4 +10,12 @@ target_sources(${LIB_FSFW_NAME}
 		QueueMapManager.cpp
 		SemaphoreFactory.cpp
 		TaskFactory.cpp
-)
\ No newline at end of file
+)
+
+if(UNIX)
+	target_link_libraries(${LIB_FSFW_NAME} 
+	PRIVATE
+		pthread
+		rt
+	)
+endif()
\ No newline at end of file
diff --git a/serviceinterface/ServiceInterfaceBuffer.cpp b/serviceinterface/ServiceInterfaceBuffer.cpp
index bc360334d..68fc4dec3 100644
--- a/serviceinterface/ServiceInterfaceBuffer.cpp
+++ b/serviceinterface/ServiceInterfaceBuffer.cpp
@@ -4,7 +4,7 @@
 #include <inttypes.h>
 
 // to be implemented by bsp
-/*extern "C" */void printChar(const char*, bool errStream);
+extern "C" void printChar(const char*, bool errStream);
 
 #ifndef UT699