diff --git a/linux-user/aarch64/mte_user_helper.h b/linux-user/aarch64/mte_user_helper.h
index 8685e5175a..0c53abda22 100644
--- a/linux-user/aarch64/mte_user_helper.h
+++ b/linux-user/aarch64/mte_user_helper.h
@@ -9,6 +9,8 @@
 #ifndef AARCH64_MTE_USER_HELPER_H
 #define AARCH64_MTE USER_HELPER_H
 
+#include "user/abitypes.h"
+
 #ifndef PR_MTE_TCF_SHIFT
 # define PR_MTE_TCF_SHIFT       1
 # define PR_MTE_TCF_NONE        (0UL << PR_MTE_TCF_SHIFT)