diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index a249a29..d481f6c 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -70,7 +70,7 @@
 extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr);
 extern int decode_negTokenInit(unsigned char *security_blob, int length,
 			enum securityEnum *secType);
-extern int cifs_inet_pton(int, char *source, void *dst);
+extern int cifs_inet_pton(const int, const char *source, void *dst);
 extern int map_smb_to_linux_error(struct smb_hdr *smb, int logErr);
 extern void header_assemble(struct smb_hdr *, char /* command */ ,
 			    const struct cifsTconInfo *, int /* length of