diff --git a/Jenkinsfile b/Jenkinsfile
index 958b46590f..24988b6812 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -4,6 +4,12 @@ pipeline {
     }
 
     stages {
+        stage('Check formatting') {
+            steps {
+                echo 'Checking formatting...'
+                sh 'tools/check_format.sh'
+            }
+        }
         stage('Setup') {
             steps {
                 sh 'cp /usr/local/etc/roms/baserom_oot.z64 baseroms/gc-eu-mq-dbg/baserom.z64'
diff --git a/src/code/main.c b/src/code/main.c
index 15a17084f4..b7407c3bf5 100644
--- a/src/code/main.c
+++ b/src/code/main.c
@@ -54,7 +54,7 @@ void Main(void* arg) {
     // "System heap initalization"
     PRINTF("システムヒープ初期化 %08x-%08x %08x\n", systemHeapStart, fb, gSystemHeapSize);
     SystemHeap_Init((void*)systemHeapStart, gSystemHeapSize); // initializes the system heap
-    
+
 #ifdef OOT_DEBUG
     {
         void* debugHeapStart;
@@ -67,7 +67,7 @@ void Main(void* arg) {
             debugHeapSize = 0x400;
             debugHeapStart = SYSTEM_ARENA_MALLOC(debugHeapSize, "../main.c", 565);
         }
-        
+
         PRINTF("debug_InitArena(%08x, %08x)\n", debugHeapStart, debugHeapSize);
         DebugArena_Init(debugHeapStart, debugHeapSize);
     }
diff --git a/tools/check_format.sh b/tools/check_format.sh
new file mode 100755
index 0000000000..1195a9c593
--- /dev/null
+++ b/tools/check_format.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+STATUSOLD=`git status --porcelain`
+./format.py -j
+if [ $? -ne 0 ]
+then
+   echo "Formatter failed. Exiting."
+   exit -1
+fi
+STATUSNEW=`git status --porcelain`
+
+if [ "${STATUSOLD}" != "${STATUSNEW}" ];
+then
+    echo ""
+    echo "Misformatted files found. Run ./format.py and verify codegen is not impacted."
+    echo ""
+    diff --unified=0  --label "Old git status" <(echo "${STATUSOLD}") --label "New git status" <(echo "${STATUSNEW}")
+    echo ""
+    echo "Exiting."
+    exit 1
+fi
+
+exit 0