diff --git a/property_service/libpropertyinfoparser/property_info_parser.cpp b/property_service/libpropertyinfoparser/property_info_parser.cpp
index 89864dd..e53c625 100644
--- a/property_service/libpropertyinfoparser/property_info_parser.cpp
+++ b/property_service/libpropertyinfoparser/property_info_parser.cpp
@@ -21,6 +21,7 @@
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 namespace android {
 namespace properties {