diff --git a/src/lowntfs-3g.c b/src/lowntfs-3g.c
index 3cff727d..7a8213c8 100644
--- a/src/lowntfs-3g.c
+++ b/src/lowntfs-3g.c
@@ -4058,6 +4058,7 @@ int main(int argc, char *argv[])
 		}
 		permissions_mode = "User mapping built";
 #endif /* POSIXACLS */
+		ctx->dmask = ctx->fmask = 0;
 	} else {
 		ctx->security.uid = ctx->uid;
 		ctx->security.gid = ctx->gid;
diff --git a/src/ntfs-3g.c b/src/ntfs-3g.c
index bef29e1b..aedb56b6 100644
--- a/src/ntfs-3g.c
+++ b/src/ntfs-3g.c
@@ -3903,6 +3903,7 @@ int main(int argc, char *argv[])
 #endif /* KERNELPERMS */
 		permissions_mode = "User mapping built";
 #endif /* POSIXACLS */
+		ctx->dmask = ctx->fmask = 0;
 	} else {
 		ctx->security.uid = ctx->uid;
 		ctx->security.gid = ctx->gid;