diff --git a/formatters/astyle/3rdparty/libastyle/CMakeLists.txt b/formatters/astyle/3rdparty/libastyle/CMakeLists.txt
index 16989b1bbf..3054f4a17c 100644
--- a/formatters/astyle/3rdparty/libastyle/CMakeLists.txt
+++ b/formatters/astyle/3rdparty/libastyle/CMakeLists.txt
@@ -1,13 +1,13 @@
 set(astylelib_SRCS
     ASBeautifier.cpp
     ASEnhancer.cpp
     ASFormatter.cpp
     ASResource.cpp
     ASLocalizer.cpp
 )
 add_library(astylelib STATIC ${astylelib_SRCS})
 set_property(TARGET astylelib PROPERTY POSITION_INDEPENDENT_CODE ON)
 if (CMAKE_COMPILER_CXX_ID MATCHES "Clang")
     # astyle lib throws lots of warnings with -Wdocumentation
-    target_compile_options(astylelib PRIVATE -Wno-documentation)
+    target_compile_options(astylelib PRIVATE "-Wno-documentation")
 endif()