diff --git a/vm/os-netbsd.h b/vm/os-netbsd.h
index 54b5d0bcff..6486acda4a 100644
--- a/vm/os-netbsd.h
+++ b/vm/os-netbsd.h
@@ -2,5 +2,4 @@
 
 #define UAP_PROGRAM_COUNTER(uap)    _UC_MACHINE_PC((ucontext_t *)uap)
 
-#define UNKNOWN_TYPE_P(file) ((file)->d_type == DT_UNKNOWN)
 #define DIRECTORY_P(file) ((file)->d_type == DT_DIR)