diff --git a/CMakeLists.txt b/CMakeLists.txt
index 11ffd5a..5bfde7a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -157,6 +157,7 @@ if(ENABLE_EMULATION)
             -Wl,--gc-sections
             )
     endif (APPLE)
+    target_link_libraries(pico_fido PRIVATE pthread m)
 else()
 pico_add_extra_outputs(pico_fido)
 target_link_libraries(pico_fido PRIVATE pico_keys_sdk pico_stdlib pico_multicore hardware_flash hardware_sync hardware_adc pico_unique_id hardware_rtc tinyusb_device tinyusb_board)