diff --git a/arch/arm64/kernel/entry-ftrace.S b/arch/arm64/kernel/entry-ftrace.S
index 8f1905b795f348eb4ae977039d31c229c4bc0a1f..e1be42e11ff5bc79435d540bc9846f2efea58b45 100644
--- a/arch/arm64/kernel/entry-ftrace.S
+++ b/arch/arm64/kernel/entry-ftrace.S
@@ -10,6 +10,7 @@
  */
 
 #include <linux/linkage.h>
+#include <asm/assembler.h>
 #include <asm/ftrace.h>
 #include <asm/insn.h>