diff --git a/src/timeshift.c b/src/timeshift.c
index 2ecc39b4..de3766e9 100644
--- a/src/timeshift.c
+++ b/src/timeshift.c
@@ -41,7 +41,7 @@ char     *timeshift_path;
 int       timeshift_unlimited_period;
 uint32_t  timeshift_max_period;
 int       timeshift_unlimited_size;
-size_t    timeshift_max_size;
+uint64_t  timeshift_max_size;
 
 /*
  * Intialise global file manager
diff --git a/src/timeshift.h b/src/timeshift.h
index 3c6fc0ab..db173625 100644
--- a/src/timeshift.h
+++ b/src/timeshift.h
@@ -25,10 +25,8 @@ extern char     *timeshift_path;
 extern int       timeshift_unlimited_period;
 extern uint32_t  timeshift_max_period;
 extern int       timeshift_unlimited_size;
-extern size_t    timeshift_max_size;
-
-extern size_t          timeshift_total_size;
-extern pthread_mutex_t timeshift_size_lock;
+extern uint64_t  timeshift_max_size;
+extern uint64_t  timeshift_total_size;
 
 typedef struct timeshift_status
 {
diff --git a/src/timeshift/timeshift_filemgr.c b/src/timeshift/timeshift_filemgr.c
index 64f724bc..185d80a5 100644
--- a/src/timeshift/timeshift_filemgr.c
+++ b/src/timeshift/timeshift_filemgr.c
@@ -39,7 +39,7 @@ static pthread_t             timeshift_reaper_thread;
 static pthread_mutex_t       timeshift_reaper_lock;
 static pthread_cond_t        timeshift_reaper_cond;
 
-size_t                       timeshift_total_size;
+uint64_t                     timeshift_total_size;
 
 /* **************************************************************************
  * File reaper thread