diff --git a/stratosphere/pm/source/impl/pm_resource_manager.cpp b/stratosphere/pm/source/impl/pm_resource_manager.cpp
index 3b5b2cc8b..aeedc11ab 100644
--- a/stratosphere/pm/source/impl/pm_resource_manager.cpp
+++ b/stratosphere/pm/source/impl/pm_resource_manager.cpp
@@ -219,8 +219,8 @@ namespace ams::pm::resource {
             R_ABORT_UNLESS(svc::GetResourceLimitLimitValue(&total_threads_available, GetResourceLimitHandle(ResourceLimitGroup_System), svc::LimitableResource_ThreadCountMax));
 
             /* See how many threads we're expecting. */
-            const s64 total_threads_allocated = g_resource_limits[ResourceLimitGroup_System][svc::LimitableResource_ThreadCountMax] -
-                                                       g_resource_limits[ResourceLimitGroup_Application][svc::LimitableResource_ThreadCountMax] -
+            const s64 total_threads_allocated = g_resource_limits[ResourceLimitGroup_System][svc::LimitableResource_ThreadCountMax] +
+                                                       g_resource_limits[ResourceLimitGroup_Application][svc::LimitableResource_ThreadCountMax] +
                                                        g_resource_limits[ResourceLimitGroup_Applet][svc::LimitableResource_ThreadCountMax];
 
             /* Ensure we don't over-commit threads. */