diff --git a/extras/150kernel/reboot150/main.c b/extras/150kernel/reboot150/main.c
index b0814598..af8a9582 100644
--- a/extras/150kernel/reboot150/main.c
+++ b/extras/150kernel/reboot150/main.c
@@ -39,9 +39,9 @@ int module_start(SceSize args, void *argp)
 {
 	int dreg = sceIoOpen("ms0:/TM/DCARK/150/registry/system.dreg", PSP_O_RDONLY, 0);
 	int ireg = sceIoOpen("ms0:/TM/DCARK/150/registry/system.ireg", PSP_O_RDONLY, 0);
-	if(dreg < 0 && ireg < 0) {
-		dreg = sceIoOpen("ms0:/TM/DCARK/150/registry/system.dreg", PSP_O_WRONLY | PSP_O_CREAT, 0777);
-		ireg = sceIoOpen("ms0:/TM/DCARK/150/registry/system.ireg", PSP_O_WRONLY | PSP_O_CREAT, 0777);
+	if(dreg < 0 || ireg < 0) {
+		dreg = sceIoOpen("ms0:/TM/DCARK/150/registry/system.dreg", PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC, 0777);
+		ireg = sceIoOpen("ms0:/TM/DCARK/150/registry/system.ireg", PSP_O_WRONLY | PSP_O_CREAT | PSP_O_TRUNC, 0777);
 		int flash_dreg = sceIoOpen("flash1:/registry/system.dreg", PSP_O_RDONLY, 0);
 		int flash_ireg = sceIoOpen("flash1:/registry/system.ireg", PSP_O_RDONLY, 0);