diff --git a/libntfs-3g/security.c b/libntfs-3g/security.c
index 55056c0d..c5978d6d 100644
--- a/libntfs-3g/security.c
+++ b/libntfs-3g/security.c
@@ -30,7 +30,7 @@
 #define FORCE_FORMAT_v1x 0	/* Insert security data as in NTFS v1.x */
 #define OWNERFROMACL 1		/* Get the owner from ACL (not Windows owner) */
 #define BUFSZ 1024		/* buffer size to read mapping file */
-#define MAPPINGFILE "NTFS-3G/UserMapping" /* default mapping file */
+#define MAPPINGFILE ".NTFS-3G/UserMapping" /* default mapping file */
 #define LINESZ 120              /* maximum useful size of a mapping line */
 #define CACHE_PERMISSIONS_BITS 6  /* log2 of unitary allocation of permissions */
 #define CACHE_PERMISSIONS_SIZE 262144 /* max cacheable permissions */