diff --git a/firmware/kernel/thread-internal.h b/firmware/kernel/thread-internal.h
index fe053fa070..e47a37dfd7 100644
--- a/firmware/kernel/thread-internal.h
+++ b/firmware/kernel/thread-internal.h
@@ -128,7 +128,7 @@ struct thread_entry
                                     all threads blocked by this one) */
 #endif
 #ifndef HAVE_SDL_THREADS
-    unsigned short stack_size;   /* Size of stack in bytes */
+    size_t stack_size;           /* Size of stack in bytes */
 #endif
     unsigned char state;         /* Thread slot state (STATE_*) */
 #ifdef HAVE_SCHEDULER_BOOSTCTRL