diff --git a/arch/arm64/src/common/arm64_vector_table.S b/arch/arm64/src/common/arm64_vector_table.S
index e4708cbb8a..a159bac2cf 100644
--- a/arch/arm64/src/common/arm64_vector_table.S
+++ b/arch/arm64/src/common/arm64_vector_table.S
@@ -89,10 +89,8 @@
 
     /* Increment exception depth */
 
-    mrs    \xreg0, tpidrro_el0
-    mov    \xreg1, #1
-    add    \xreg0, \xreg0, \xreg1
-    msr    tpidrro_el0, \xreg0
+    add    \xreg1, \xreg1, #1
+    msr    tpidrro_el0, \xreg1
 
     /* Save the FPU registers */