diff --git a/cmake/ci.cmake b/cmake/ci.cmake
index 6a08824eb..f4a9b2b9d 100644
--- a/cmake/ci.cmake
+++ b/cmake/ci.cmake
@@ -855,6 +855,7 @@ add_custom_target(ci_icpc
     COMMAND ${CMAKE_COMMAND}
         -DCMAKE_BUILD_TYPE=Debug -GNinja
         -DCMAKE_C_COMPILER=icc -DCMAKE_CXX_COMPILER=icpc
+        -DCMAKE_CXX_FLAGS="-DJSON_HAS_FILESYSTEM=0 -DJSON_HAS_EXPERIMENTAL_FILESYSTEM=0"
         -DJSON_BuildTests=ON -DJSON_FastTests=ON
         -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_icpc
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_icpc