diff --git a/sessions.h b/sessions.h
index a1d6991..30d956a 100644
--- a/sessions.h
+++ b/sessions.h
@@ -8,10 +8,6 @@
 #include <fcntl.h>
 #include <time.h>
 
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__BSD__) || defined(BSD)
-#define RDO_USE_IOCTL 1
-#endif
-
 int getpstartts(int pid, unsigned long long* startts) {
     char path[255], fc[1024];
     char* ptr = fc;
@@ -82,7 +78,7 @@ int ensuredir() {
     return 0;
 }
 
-#ifdef RDO_USE_IOCTL
+#ifdef __OpenBSD__
 
 void setsession(int ts_ttl) {
     if (ts_ttl <= 0)