diff --git a/haiku-apps/slayer/patches/slayer-0.9.patchset b/haiku-apps/slayer/patches/slayer-0.9.patchset
new file mode 100644
index 000000000..0a7baa832
--- /dev/null
+++ b/haiku-apps/slayer/patches/slayer-0.9.patchset
@@ -0,0 +1,52 @@
+From aa827341d670c542f8b8475ba3cc63384aa8537d Mon Sep 17 00:00:00 2001
+From: Adrien Destugues <pulkomandy@pulkomandy.tk>
+Date: Thu, 12 Nov 2015 08:49:19 +0100
+Subject: Exclude Idle threads from CPU use compuation.
+
+
+diff --git a/src/MainWindow.cpp b/src/MainWindow.cpp
+index 7f392a2..44f66f0 100644
+--- a/src/MainWindow.cpp
++++ b/src/MainWindow.cpp
+@@ -282,6 +282,7 @@ void MainWindow::UpdateTeams()
+ 	iteration = (iteration + 1) % 2;
+ 
+ 	total_CPU_diff = 0;
++	int idle_CPU_diff = 0;
+ 		
+ 	for (i = 0; get_next_team_info(&te_cookie, &teinf) == B_NO_ERROR; i++) {
+ 		if (!(team_item = (TeamItem *)team_items_list->get(teinf.team))) {
+@@ -297,7 +298,10 @@ void MainWindow::UpdateTeams()
+ 				thread_item->refreshed = iteration;
+ 				team_item->thread_items_list->put(thinf.thread, thread_item);
+ 				teamView->AddUnder(thread_item, team_item);
+-				team_item->CPU_diff += thread_item->CPU_diff;
++				if (teinf.team != 1 || strncmp(thinf.name, "idle thread ", 12) != 0) {
++					team_item->CPU_diff += thread_item->CPU_diff;
++				} else
++					idle_CPU_diff += thread_item->CPU_diff;
+ 			}
+ 		}
+ 		// update team
+@@ -318,13 +322,17 @@ void MainWindow::UpdateTeams()
+ 					thread_item->update(&thinf);
+ 					thread_item->refreshed = iteration;
+ 				}
+-				team_item->CPU_diff += thread_item->CPU_diff;
++				if (teinf.team != 1 || strncmp(thinf.name, "idle thread ", 12) != 0) {
++					team_item->CPU_diff += thread_item->CPU_diff;
++				} else
++					idle_CPU_diff += thread_item->CPU_diff;
+ 			} 
+ 
+ 		}
+ 		total_CPU_diff += team_item->CPU_diff;
+ 		if (total_CPU_diff < 0) printf("Error. CPU diff out of bounds\n");
+ 	}
++	total_CPU_diff += idle_CPU_diff;
+ 
+ 	// division by zero && overflow handling
+ 	if (total_CPU_diff <= 0) total_CPU_diff = 1;
+-- 
+2.2.2
+
diff --git a/haiku-apps/slayer/slayer-0.9.recipe b/haiku-apps/slayer/slayer-0.9.recipe
index 630e38dbc..f39a628eb 100644
--- a/haiku-apps/slayer/slayer-0.9.recipe
+++ b/haiku-apps/slayer/slayer-0.9.recipe
@@ -8,6 +8,8 @@ SOURCE_URI="git+https://github.com/HaikuArchives/Slayer.git#e04057b"
 REVISION="2"
 ARCHITECTURES="?x86 x86_gcc2"
 
+PATCHES="slayer-$portVersion.patchset"
+
 PROVIDES="
 	slayer = $portVersion
 	app:Slayer = $portVersion