diff --git a/adapter/syscall/Makefile b/adapter/syscall/Makefile
index f93e7906e..0cc448082 100644
--- a/adapter/syscall/Makefile
+++ b/adapter/syscall/Makefile
@@ -1,4 +1,4 @@
-TOPDIR=..
+TOPDIR=../..
 
 ifeq ($(FF_PATH),)
 	FF_PATH=${TOPDIR}
diff --git a/adapter/syscall/ff_hook_syscall.c b/adapter/syscall/ff_hook_syscall.c
index 57010060e..ff52de606 100644
--- a/adapter/syscall/ff_hook_syscall.c
+++ b/adapter/syscall/ff_hook_syscall.c
@@ -6,6 +6,7 @@
 #include <errno.h>
 #include <time.h>
 #include <unistd.h>
+#include <pthread.h>
 
 #include <rte_malloc.h>
 #include <rte_memcpy.h>