diff --git a/apps/sysfuzz.cpp b/apps/sysfuzz.cpp
index 424729ca..75348e18 100644
--- a/apps/sysfuzz.cpp
+++ b/apps/sysfuzz.cpp
@@ -20,7 +20,7 @@ int random_syscall()
     while (true)
     {
         sys = rand() % Syscalls::__count;
-        if (sys == SYS_exit || sys == SYS_usleep || sys == SYS_fork) continue;
+        if (sys == SYS_exit || sys == SYS_usleep || sys == SYS_fork || sys == SYS_sigreturn) continue;
         break;
     }