diff --git a/src/detection/cpu/cpu_windows.c b/src/detection/cpu/cpu_windows.c
index 6a4d8195e..81bae35a1 100644
--- a/src/detection/cpu/cpu_windows.c
+++ b/src/detection/cpu/cpu_windows.c
@@ -68,7 +68,7 @@ inline static const char* detectSpeedByCpuid(FFCPUResult* cpu)
 
 #else
 
-inline static const char* detectSpeedByCpuid(FFCPUResult* cpu)
+inline static const char* detectSpeedByCpuid(FF_MAYBE_UNUSED FFCPUResult* cpu)
 {
     return "Unsupported platform";
 }