diff --git a/nx/include/switch/kernel/svc.h b/nx/include/switch/kernel/svc.h
index 7a2dfc7c..e5d0c4b6 100644
--- a/nx/include/switch/kernel/svc.h
+++ b/nx/include/switch/kernel/svc.h
@@ -842,6 +842,14 @@ Result svcGetDebugThreadContext(u8* out, Handle debug, u64 threadID, u32 flags);
  */
 Result svcGetProcessList(u32 *num_out, u64 *pids_out, u32 max_pids);
 
+/**
+ * @brief Retrieves a list of all threads for a debug handle (or zero).
+ * @return Result code.
+ * @note Syscall number 0x66.
+ * @warning This is a privileged syscall. Use \ref envIsSyscallHinted to check if it is available.
+ */
+Result svcGetThreadList(u32 *num_out, u64 *tids_out, u32 max_tids, Handle debug);
+
 ///@}
 
 ///@name Debugging
diff --git a/nx/source/kernel/svc.s b/nx/source/kernel/svc.s
index 43315560..769c42ad 100644
--- a/nx/source/kernel/svc.s
+++ b/nx/source/kernel/svc.s
@@ -445,6 +445,14 @@ SVC_BEGIN svcGetProcessList
 	ret
 SVC_END
 
+SVC_BEGIN svcGetThreadList
+	str x0, [sp, #-16]!
+	svc 0x66
+	ldr x2, [sp], #16
+	str w1, [x2]
+	ret
+SVC_END
+
 SVC_BEGIN svcGetDebugThreadContext
 	svc 0x67
 	ret