diff --git a/ports/cmake/src/libout123/modules/CMakeLists.txt b/ports/cmake/src/libout123/modules/CMakeLists.txt
index 21810c6..51c673d 100644
--- a/ports/cmake/src/libout123/modules/CMakeLists.txt
+++ b/ports/cmake/src/libout123/modules/CMakeLists.txt
@@ -17,11 +17,11 @@ if(NOT USE_MODULES)
         $<$<STREQUAL:${DEFAULT_OUTPUT_MODULE},win32>:${WIN32_LIBRARIES}>
         $<$<STREQUAL:${DEFAULT_OUTPUT_MODULE},win32_wasapi>:${WIN32_WASAPI_LIBRARIES}>)
     if(DEFAULT_OUTPUT_MODULE STREQUAL "pulse")
-        target_compile_definitions(defaultmodule PRIVATE ${PULSE_CFLAGS})
+        target_compile_options(defaultmodule PRIVATE ${PULSE_CFLAGS})
     elseif(DEFAULT_OUTPUT_MODULE STREQUAL "jack")
-        target_compile_definitions(defaultmodule PRIVATE ${JACK_CFLAGS})
+        target_compile_options(defaultmodule PRIVATE ${JACK_CFLAGS})
     elseif(DEFAULT_OUTPUT_MODULE STREQUAL "tinyalsa")
-        target_compile_definitions(defaultmodule PRIVATE ${TINYALSA_CFLAGS})
+        target_compile_options(defaultmodule PRIVATE ${TINYALSA_CFLAGS})
     endif()
     if(BUILD_SHARED_LIBS)
         set_target_properties(defaultmodule PROPERTIES POSITION_INDEPENDENT_CODE ON)