diff --git a/common/aarch64/debug.S b/common/aarch64/debug.S
index d794d12..4478d0d 100644
--- a/common/aarch64/debug.S
+++ b/common/aarch64/debug.S
@@ -6,6 +6,7 @@
 
 #include <arch.h>
 #include <asm_macros.S>
+#include <debug.h>
 
 	.globl	asm_print_str
 	.globl	asm_print_hex