diff --git a/include/ntfs/crypto.h b/include/ntfs/crypto.h
index 6f8361d9..a4b72435 100644
--- a/include/ntfs/crypto.h
+++ b/include/ntfs/crypto.h
@@ -23,6 +23,8 @@
 #ifndef _NTFS_CRYPTO_H
 #define _NTFS_CRYPTO_H
 
+extern ntfschar NTFS_EFS[5];
+
 /*
  * This is our Big Secret (TM) structure, so do not allow anyone even read it
  * values. ;-) In fact, it is private because exist only in libntfs version
diff --git a/libntfs/crypto.c b/libntfs/crypto.c
index e448cf84..1a1b3468 100644
--- a/libntfs/crypto.c
+++ b/libntfs/crypto.c
@@ -134,7 +134,7 @@ typedef struct {
 	gcry_cipher_hd_t gcry_cipher_hd;
 } ntfs_desx_ctx;
 
-static ntfschar NTFS_EFS[5] = {
+ntfschar NTFS_EFS[5] = {
 	const_cpu_to_le16('$'), const_cpu_to_le16('E'), const_cpu_to_le16('F'),
 	const_cpu_to_le16('S'), const_cpu_to_le16(0)
 };