diff --git a/CMakeLists.txt b/CMakeLists.txt
index 98a884bf9ab..88689591c78 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -173,7 +173,7 @@ if(S2N_BLOCK_NONPORTABLE_OPTIMIZATIONS)
 endif()
 
 target_compile_options(${PROJECT_NAME} PUBLIC -fPIC)
-target_compile_options(${PROJECT_NAME} PRIVATE -include ${CMAKE_CURRENT_LIST_DIR}/utils/s2n_prelude.h)
+target_compile_options(${PROJECT_NAME} PRIVATE -include "${CMAKE_CURRENT_LIST_DIR}/utils/s2n_prelude.h")
 
 # Match on Release, RelWithDebInfo and MinSizeRel
 # See: https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html#variable:CMAKE_BUILD_TYPE
@@ -451,7 +451,7 @@ if (BUILD_TESTING)
 
     add_library(testss2n STATIC ${TESTLIB_HEADERS} ${TESTLIB_SRC} ${EXAMPLES_SRC})
     target_include_directories(testss2n PUBLIC tests)
-    target_compile_options(testss2n PRIVATE -std=gnu99 -include ${CMAKE_CURRENT_LIST_DIR}/utils/s2n_prelude.h)
+    target_compile_options(testss2n PRIVATE -std=gnu99 -include "${CMAKE_CURRENT_LIST_DIR}/utils/s2n_prelude.h")
     target_link_libraries(testss2n PUBLIC ${PROJECT_NAME})
 
     if (S2N_INTERN_LIBCRYPTO)