diff --git a/source/start.s b/source/start.s
index a43cfae..f0f7f3c 100644
--- a/source/start.s
+++ b/source/start.s
@@ -77,8 +77,9 @@ start:
     mcr p15, 0, r8, c2, c0, 0   @ Data cacheable 0, 2, 4
     mcr p15, 0, r8, c2, c0, 1   @ Inst cacheable 0, 2, 4
 
-    @ Enable caches / MPU
+    @ Enable caches / MPU / ITCM
     mrc p15, 0, r0, c1, c0, 0  @ read control register
+    orr r0, r0, #(1<<18)       @ - ITCM enable
     orr r0, r0, #(1<<12)       @ - instruction cache enable
     orr r0, r0, #(1<<2)        @ - data cache enable
     orr r0, r0, #(1<<0)        @ - mpu enable