diff --git a/src/lib/sandbox/sandbox.c b/src/lib/sandbox/sandbox.c
index 1d2c40c753..626a4dc5a5 100644
--- a/src/lib/sandbox/sandbox.c
+++ b/src/lib/sandbox/sandbox.c
@@ -166,6 +166,7 @@ static int filter_nopar_gen[] = {
 #ifdef __NR_fstat64
     SCMP_SYS(fstat64),
 #endif
+    SCMP_SYS(fsync),
     SCMP_SYS(futex),
     SCMP_SYS(getdents),
     SCMP_SYS(getdents64),