diff --git a/Jenkinsfile b/Jenkinsfile
index 4a6388f600..348dda0c37 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -2,6 +2,11 @@ pipeline {
     agent any
 
     stages {
+        stage('Check for unused asm') {
+            steps {
+                sh './tools/find_unused_asm.sh'
+            }
+        }
         stage('Setup') {
             steps {
                 echo 'Setting up...'
diff --git a/data/overlays/actors/z_arms_hook.data.s b/data/overlays/actors/z_arms_hook.data.s
deleted file mode 100644
index e45f30bea0..0000000000
--- a/data/overlays/actors/z_arms_hook.data.s
+++ /dev/null
@@ -1,32 +0,0 @@
-.include "macro.inc"
-
- # assembler directives
- .set noat      # allow manual use of $at
- .set noreorder # don't insert nops after branches
- .set gp=64     # allow use of 64-bit general purpose registers
-
-.section .data
-
-.balign 16
-
-glabel Arms_Hook_InitVars
- .word 0x00660700, 0x00000030, 0x00140000, 0x00000218
-.word ArmsHook_Init
-.word ArmsHook_Destroy
-.word ArmsHook_Update
-.word ArmsHook_Draw
-glabel D_80865B00
- .word 0x0A090000, 0x08030000, 0x02000000, 0x00000080, 0x00010000, 0xFFCFFFFF, 0x00000000, 0x05000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x3F000000, 0x00000000, 0x00000000, 0x3F000000, 0x00000000, 0xFFFF64FF, 0xFF320000
-glabel D_80865B70
- .word 0x00000000, 0x00000000, 0x00000000
-glabel D_80865B7C
- .word 0x00000000, 0x00000000, 0x44610000
-glabel D_80865B88
- .word 0x00000000, 0x43FA0000, 0xC53B8000
-glabel D_80865B94
- .word 0x00000000, 0xC3FA0000, 0xC53B8000
-glabel D_80865BA0
- .word 0x00000000, 0x43FA0000, 0x44960000
-glabel D_80865BAC
- .word 0x00000000, 0xC3FA0000, 0x44960000, 0x00000000, 0x00000000
-
diff --git a/data/overlays/actors/z_arms_hook.reloc.s b/data/overlays/actors/z_arms_hook.reloc.s
deleted file mode 100644
index d439138c87..0000000000
--- a/data/overlays/actors/z_arms_hook.reloc.s
+++ /dev/null
@@ -1,13 +0,0 @@
-.include "macro.inc"
-
- # assembler directives
- .set noat      # allow manual use of $at
- .set noreorder # don't insert nops after branches
- .set gp=64     # allow use of 64-bit general purpose registers
-
-.section .rodata
-
-.balign 16
-
-glabel D_80865C20
-    .incbin "baserom/ovl_Arms_Hook", 0xD20, 0x000000F0
diff --git a/tools/find_unused_asm.sh b/tools/find_unused_asm.sh
index 23e480e3bf..56009ed21b 100755
--- a/tools/find_unused_asm.sh
+++ b/tools/find_unused_asm.sh
@@ -19,13 +19,22 @@ done < data_list.txt
 comm -3 <(sort old_list.txt) <(sort cur_list.txt) > diff.txt
 comm -3 <(sort old_data_list.txt) <(sort list.txt) >> diff.txt
 
+rm old_list.txt cur_list.txt old_data_list.txt data_list.txt list.txt
+
 if [ "$1" = "-d" ]
 then
 	if [ -s diff.txt ]
 	then
-		git rm $(cat diff.txt)
+		rm $(cat diff.txt)
 	fi
 	rm diff.txt
+else
+	if [ -s diff.txt ]
+	then
+		cat diff.txt
+		rm diff.txt
+		exit 55
+	else
+		rm diff.txt
+	fi
 fi
-
-rm old_list.txt cur_list.txt old_data_list.txt data_list.txt list.txt