diff --git a/resources/3rdparty/include_cpptemplate.cmake b/resources/3rdparty/include_cpptemplate.cmake
index 51426e755..138965f15 100644
--- a/resources/3rdparty/include_cpptemplate.cmake
+++ b/resources/3rdparty/include_cpptemplate.cmake
@@ -1,8 +1,10 @@
 string(REPLACE " " ";" CMAKE_CXX_FLAGS_AS_LIST ${CMAKE_CXX_FLAGS})
 if(CMAKE_BUILD_TYPE MATCHES DEBUG)
-    list(APPEND CMAKE_CXX_FLAGS_AS_LIST ${CMAKE_CXX_FLAGS_DEBUG})
+	string(REPLACE " " ";" CMAKE_CXX_FLAGS_DEBUG_AS_LIST ${CMAKE_CXX_FLAGS_DEBUG})
+    list(APPEND CMAKE_CXX_FLAGS_AS_LIST ${CMAKE_CXX_FLAGS_DEBUG_AS_LIST})
 else()
-    list(APPEND CMAKE_CXX_FLAGS_AS_LIST ${CMAKE_CXX_FLAGS_RELEASE})
+	string(REPLACE " " ";" CMAKE_CXX_FLAGS_RELEASE_AS_LIST ${CMAKE_CXX_FLAGS_RELEASE})
+    list(APPEND CMAKE_CXX_FLAGS_AS_LIST ${CMAKE_CXX_FLAGS_RELEASE_AS_LIST})
 endif()
 set(CPPTEMPLATE_LIB_DIR ${STORM_3RDPARTY_BINARY_DIR}/cpptemplate)
 ExternalProject_Add(