diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8c1b94ce9..bb6798ca4 100755
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -129,6 +129,7 @@ function(add_systemc_library libName scBuildDefine)
     if(SYSTEMC_UNITY_BUILD)
       message(STATUS "Enable SystemC unity build")
       set_target_properties(${libName} PROPERTIES UNITY_BUILD ON)
+      set_source_files_properties(sysc/kernel/sc_main.cpp PROPERTIES SKIP_UNITY_BUILD_INCLUSION ON)
       set_source_files_properties(sysc/utils/sc_utils_ids.cpp PROPERTIES SKIP_UNITY_BUILD_INCLUSION ON)
     else()
       message(STATUS "Disable SystemC unity build")