diff --git a/loader/src/ptracer/main.cpp b/loader/src/ptracer/main.cpp
index 9deeb4d..010800b 100644
--- a/loader/src/ptracer/main.cpp
+++ b/loader/src/ptracer/main.cpp
@@ -18,7 +18,11 @@ int main(int argc, char **argv) {
         return 0;
     } else if (argc >= 3 && argv[1] == "trace"sv) {
         auto pid = strtol(argv[2], 0, 0);
-        return !trace_zygote(pid);
+        if (!trace_zygote(pid)) {
+            kill(pid, SIGKILL);
+            return 1;
+        }
+        return 0;
     } else if (argc >= 3 && argv[1] == "ctl"sv) {
         if (argv[2] == "start"sv) {
             send_control_command(START);
diff --git a/loader/src/ptracer/ptracer.cpp b/loader/src/ptracer/ptracer.cpp
index a6a8cce..55c933c 100644
--- a/loader/src/ptracer/ptracer.cpp
+++ b/loader/src/ptracer/ptracer.cpp
@@ -74,7 +74,7 @@ bool inject_on_main(int pid, const char *lib_path) {
     }
     if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGSEGV) {
         if (!get_regs(pid, regs)) return false;
-        if (regs.REG_IP != break_addr) {
+        if ((regs.REG_IP & ~1) != (break_addr & ~1)) {
             LOGE("stopped at unknown addr %p", (void *) regs.REG_IP);
             return false;
         }